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48-711: The Royal Signals and Radar Establishment ( RSRE ) was a scientific research establishment within the Ministry of Defence (MoD) of the United Kingdom . It was located primarily at Malvern in Worcestershire , England . The RSRE motto was Ubique Sentio ( Latin for "I sense everywhere"). RSRE was formed in 1976 by an amalgamation of previous research organizations; these included the Royal Radar Establishment (RRE), itself derived from

96-732: A desire to curb interservice rivalries and followed the precedent set by the American National Security Act of 1947 . The Ministers in the Ministry of Defence are as follows, with cabinet ministers in bold: The Chief of the Defence Staff (CDS) is the professional head of the British Armed Forces and the most senior uniformed military adviser to the Secretary of State for Defence and

144-486: A public inquiry. The report estimated these tests affected millions of people, including during one period between 1961 and 1968 where "more than a million people along the south coast of England, from Torquay to the New Forest , were exposed to bacteria including E.coli and Bacillus globigii , which mimics anthrax ." Two scientists commissioned by the Ministry of Defence stated that these trials posed no risk to

192-500: A series of secret germ warfare tests on the public" and many of these tests "involved releasing potentially dangerous chemicals and micro-organisms over vast swathes of the population without the public being told." The Ministry of Defence claims that these trials were to simulate germ warfare and that the tests were harmless. However, families who have been in the area of many of the tests are experiencing children with birth defects and physical and mental handicaps and many are asking for

240-540: A set of address classes while preserving the existing network numbers in the first of these classes. The new addressing architecture was introduced by RFC   791 in 1981 as a part of the specification of the Internet Protocol. It divided the address space into primarily three address formats, henceforth called address classes , and left a fourth range reserved to be defined later. The first class, designated as Class A , contained all addresses in which

288-424: A significant loss of personnel and would have had adverse effects on recruitment. In 2013, it was found that the Ministry of Defence had overspent on its equipment budget by £6.5bn on orders that could take up to 39 years to fulfil. The Ministry of Defence has been criticised in the past for poor management and financial control. Specific examples of overspending include: In May 2024, the ministry's payroll system

336-462: A united ministry of defence was rejected by the coalition government of David Lloyd George in 1921, but the Chiefs of Staff Committee was formed in 1923, for the purposes of inter-service co-ordination. As rearmament became a concern during the 1930s, Stanley Baldwin created the position of Minister for Co-ordination of Defence . Ernle Chatfield, 1st Baron Chatfield held the post until the fall of

384-561: Is about 1.8% of the UK land mass. The total annual cost to support the defence estate is "in excess of £3.3 billion". The defence estate is divided as training areas & ranges (84.0%), research & development (5.4%), airfields (3.4%), barracks & camps (2.5%), storage & supply depots (1.6%), and other (3.0%). These are largely managed by the Defence Infrastructure Organisation . The headquarters of

432-691: Is flanked by two monumental statues, Earth and Water , by Charles Wheeler . Opposite stands the Gurkha Monument, sculpted by Philip Jackson and unveiled in 1997 by Queen Elizabeth II . Within it is the Victoria Cross and George Cross Memorial, and nearby are memorials to the Fleet Air Arm and RAF (to its east, facing the riverside). Henry VIII 's wine cellar at the Palace of Whitehall , built in 1514–1516 for Cardinal Wolsey ,

480-534: Is in the basement of Main Building, and is used for entertainment. The entire vaulted brick structure of the cellar was encased in steel and concrete and relocated nine feet to the west and nearly 19 feet (5.8 m) deeper in 1949, when construction was resumed at the site after World War II . This was carried out without any significant damage to the structure. The most notable fraud conviction has been that of Gordon Foxley , Director of Ammunition Procurement at

528-582: The Chamberlain government in 1940. His success was limited by his lack of control over the existing Service departments, and his lack of political influence. On forming his government in 1940, Winston Churchill created the office of Minister of Defence, to exercise ministerial control over the Chiefs of Staff Committee and to co-ordinate defence matters. The post was held by the Prime Minister of

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576-735: The ELLA hardware description language, and the TenDRA C/C++ compiler. RSRE was an early researcher of TCP/IP in Europe, along with Peter Kirstein's group at University College London and NDRE in Norway. The first email sent by a head of state was sent from the RSRE over the ARPANET by Queen Elizabeth II on 26 March 1976. RSRE was allocated class A Internet net 25 in 1979, which later became

624-721: The Intelligence and Security Committee of Parliament . During the 1920s and 1930s, British civil servants and politicians, looking back at the performance of the state during World War I , concluded that there was a need for greater co-ordination between the three services that made up the armed forces of the United Kingdom: the Royal Navy , the British Army and the Royal Air Force . The formation of

672-586: The Permanent Secretary ) is the senior civil servant at the MOD. Their role is to ensure that it operates effectively as a government department and has responsibility for the strategy, performance, reform, organisation and the finances of the MOD. The role works closely with the Chief of the Defence Staff in leading the organisation and supporting Ministers in the conduct of business in the department across

720-659: The Prime Minister . The CDS is supported by the Vice Chief of the Defence Staff (VCDS) who deputises and is responsible for the day-to-day running of the armed services aspect of the MOD through the Central Staff, working closely alongside the Permanent Secretary. They are joined by the professional heads of the three British armed services ( Royal Navy , British Army and Royal Air Force ) and

768-483: The United Kingdom of Great Britain and Northern Ireland and its interests and to strengthen international peace and stability. The MOD also manages day-to-day running of the armed forces, contingency planning and defence procurement . The expenditure, administration and policy of the MOD are scrutinised by the Defence Select Committee , except for Defence Intelligence which instead falls under

816-520: The Commander of Strategic Command . All personnel sit at OF-9 rank in the NATO rank system . Together the Chiefs of Staff form the Chiefs of Staff Committee with responsibility for providing advice on operational military matters and the preparation and conduct of military operations. The current Chiefs of Staff are as follows. The Chief of Defence Staff is supported by several Deputy Chiefs of

864-821: The Defence Staff and senior officers at OF-8 rank. Additionally, there are a number of Assistant Chiefs of Defence Staff , including the Defence Services Secretary in the Royal Household of the Sovereign of the United Kingdom , who is also the Assistant Chief of Defence Staff (Personnel). Permanent Secretary and other senior officials The Ministers and Chiefs of the Defence Staff are supported by several civilian, scientific and professional military advisors. The Permanent Under-Secretary of State for Defence (generally known as

912-719: The MOD (not to be confused with DEFCON as used by the United States Armed Forces , which refers to a level of military "defence readiness condition"). Examples include: A full set of the DEFCONs can be accessed via the MoD's Defence Gateway (registration required). The government noted in 2013 that the MoD's third-party expenditure was characterised by "complex, high-value contracts". Defence purchasing contributes to government ambitions to make supply chains more accessible to small and medium-sized enterprises , but

960-641: The MOD are in Whitehall and is known as MOD Main Building . This structure is neoclassical in style and was originally built between 1938 and 1959 to designs by Vincent Harris to house the Air Ministry and the Board of Trade . A major refurbishment of the building was completed under a Private Finance Initiative contract by Skanska in 2004. The northern entrance in Horse Guards Avenue

1008-717: The MOD is responsible for the administration of the Sovereign Base Areas of Akrotiri and Dhekelia in Cyprus. Competitive procurement processes are used whenever possible, and all new direct tender and contract opportunities valued over £10,000 are advertised on a system called the Defence Sourcing Portal. A separate internal policy generally operates in respect of low value purchasing below this threshold. DEFCON contract conditions are numbered defence contract conditions are in contracts issued by

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1056-639: The Ministry of Defence address space, providing 16.7 million IPv4 addresses. Ministry of Defence (United Kingdom) The Ministry of Defence ( MOD or MoD ) is a ministerial department of the Government of the United Kingdom . It is responsible for implementing the defence policy set by the government and serves as the headquarters of the British Armed Forces . The MOD states that its principal objectives are to defend

1104-422: The Ministry of Defence from 1981 to 1984. Police claimed he received at least £3.5m in total in corrupt payments, such as substantial bribes from overseas arms contractors aiming to influence the allocation of contracts. A government report covered by The Guardian newspaper in 2002 indicated that between 1940 and 1979, the Ministry of Defence "turned large parts of the country into a giant laboratory to conduct

1152-630: The MoD, and the remainder into the fully government-owned laboratory DSTL . In 2003 the Carlyle Group bought a private equity stake (~30%) in QinetiQ. Some of the most important technologies developed from work at RSRE are radar , satellite communications , thermography , liquid crystal displays , speech synthesis and the Touchscreen . Predecessor organisation Signals Research and Development Establishment (SRDE) had been involved in

1200-870: The World War II-era Telecommunications Research Establishment , the Signals Research and Development Establishment (SRDE) in Christchurch, Dorset , and the Services Electronic Research Laboratory (SERL) at Baldock . Beginning in 1979, the SRDE and SERL moved to Malvern to join the RRE's location. There were several out-stations in Worcestershire , including the ex- RAF airfields at Defford and Pershore and

1248-423: The address), which uniquely identified a host connected to that network. This format was sufficient at a time when only a few large networks existed, such as the ARPANET (network number 10), and before the wide proliferation of local area networks (LANs). As a consequence of this architecture, the address space supported only a low number (254) of independent networks. Before the introduction of address classes,

1296-424: The address, thus leaving 16 bits for numbering host on the network for a total of 65 536 addresses per network. Class C was defined with the 3 high-order bits set to 1, 1, and 0, and designating the next 21 bits to number the networks, leaving each network with 256 local addresses. The leading bit sequence 111 designated an at-the-time unspecified addressing mode (" escape to extended addressing mode "), which

1344-436: The army. In August 2019, A Commons Defence Select Committee report revealed that several female and BAME military staff have raised concerns regarding discrimination, bullying and harassment. In September 2019, two former British army soldiers Nkululeko Zulu and Hani Gue won a racial discrimination claim against the Ministry of Defence (MoD). In November 2019, mixed race soldier Mark De Kretser sued MoD for £100k claiming he

1392-448: The control of the MOD. Top level budgets The MOD comprises seven top-level budgets . The head of each organisation is personally accountable for the performance and outputs of their particular organisation. These are: Executive agencies Executive non-departmental public bodies Advisory non-departmental public bodies Ad-hoc advisory group Other bodies Public corporations Enabling organisation In addition,

1440-624: The day until Clement Attlee 's government introduced the Ministry of Defence Act of 1946 . After 1946, the three posts of Secretary of State for War , First Lord of the Admiralty , and Secretary of State for Air were formally subordinated to the new Minister of Defence , who had a seat in the Cabinet. The three service ministers – Admiralty, War, Air – remained in direct operational control of their respective services, but ceased to attend Cabinet. From 1946 to 1964, five Departments of State did

1488-427: The default configuration parameters of some network software and hardware components, most notably in the default configuration of subnet masks . In the original address definition, the most significant eight bits of the 32-bit IPv4 address was the network number field which specified the particular network a host was attached to. The remaining 24 bits specified the local address, also called rest field (the rest of

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1536-486: The development of military communications satellites , within the U.S. Interim Defense Communication Satellite Program (IDCSP) and the development of the British Skynet 1 and 2 satellite types . The SRDE establishment moved to a RSRE facility at RAF Defford near Malvern in 1980, which had the benefit of flat terrain for good satellite dish positioning and the nearby Bredon Hill for satellite simulators. RSRE

1584-419: The existing networks. The solution was to expand the definition of the network number field to include more bits, allowing more networks to be designated, each potentially having fewer hosts. Since all existing network numbers at the time were smaller than 64, they had only used the 6 least-significant bits of the network number field. Thus it was possible to use the most-significant bits of an address to introduce

1632-433: The following tables. In the following bit-wise representation, The number of addresses usable for addressing specific hosts in each network is always 2 - 2 , where N is the number of rest field bits, and the subtraction of 2 adjusts for the use of the all-bits-zero host value to represent the network address and the all-bits-one host value for use as a broadcast address. Thus, for a Class C address with 8 bits available in

1680-593: The full range of responsibilities. The Strategic Defence and Security Review 2015 included £178 billion investment in new equipment and capabilities. The review set a defence policy with four primary missions for the Armed Forces: The review stated the Armed Forces will also contribute to the government's response to crises by being prepared to: Defence is governed and managed by several committees. The following organisational groups come under

1728-399: The government commented that it had yet to secure good insight into the supply chain role of SMEs. The Ministry of Defence is one of the United Kingdom's largest landowners, owning 227,300 hectares of land and foreshore (either freehold or leasehold) at April 2014, which was valued at "about £20 billion". The MOD also has "rights of access" to a further 222,000 hectares. In total, this

1776-812: The host field, the maximum number of hosts is 254. Today, IP addresses are associated with a subnet mask . This was not required in a classful network because the mask was implied by the address itself; any network device would inspect the first few bits of the IP address to determine the class of the address and thus its netmask. The blocks numerically at the start and end of classes A, B and C were originally reserved for special addressing or future features, i.e., 0.0.0.0 / 8 and 127.0.0.0 / 8 are reserved in former class A; 128.0.0.0 / 16 and 191.255.0.0 / 16 were reserved in former class B but are now available for assignment; 192.0.0.0 / 24 and 223.255.255.0 / 24 are reserved in former class C. While

1824-649: The introduction of Classless Inter-Domain Routing (CIDR) in 1993. The method divides the IP address space for Internet Protocol version 4 (IPv4) into five address classes based on the leading four address bits. Classes A, B, and C provide unicast addresses for networks of three different network sizes. Class D is for multicast networking and the class E address range is reserved for future or experimental purposes. Since its discontinuation, remnants of classful network concepts have remained in practice only in limited scope in

1872-413: The most significant bit is zero. The network number for this class is given by the next 7 bits, therefore accommodating 128 networks in total, including the zero network, and including the IP networks already allocated. A Class B network was a network in which all addresses had the two most-significant bits set to 1 and 0 respectively. For these networks, the network address was given by the next 14 bits of

1920-518: The only address blocks available were these large blocks which later became known as Class A networks. As a result, some organizations involved in the early development of the Internet received very large address space allocations (16,777,216 IP addresses each). Expansion of the network had to ensure compatibility with the existing address space and the IPv4 packet structure, and avoid the renumbering of

1968-503: The public. This was confirmed by Sue Ellison, a representative of the Defence Science and Technology Laboratory at Porton Down who said that the results from these trials "will save lives, should the country or our forces face an attack by chemical and biological weapons." In February 2019, former soldier Inoke Momonakaya won £458,000 payout after a legal battle for the racial harassment and bullying he received while serving in

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2016-623: The satellite tracking station at Sheriffs Lench . In April 1991 RSRE amalgamated with other defence research establishments to form the Defence Research Agency , which in April 1995 amalgamated with more organisations to form the Defence Evaluation and Research Agency . In June 2001 this became independent of the MoD, with approximately two-thirds of it being incorporated into QinetiQ , a commercial company owned by

2064-521: The work of the modern Ministry of Defence: the Admiralty , the War Office , the Air Ministry , the Ministry of Aviation , and an earlier form of the Ministry of Defence. Those departments merged in 1964, and the defence functions of the Ministry of Aviation Supply were merged into the Ministry of Defence in 1971. The unification of all defence activities under a single ministry was motivated by

2112-429: Was in most cases much larger than required. Due to the rapid growth of the Internet, the pool of unassigned Class B addresses (2 , or about 16,000) was rapidly being depleted. Starting in 1993, classful networking was replaced by Classless Inter-Domain Routing (CIDR), in an attempt to solve this problem. Under classful network addressing, the 32-bit IPv4 address space was partitioned into five classes (A-E) as shown in

2160-460: Was involved in the design and testing of Skynet 4 and its ground facilities and terminals. Contributions to computer science made by the RSRE included ALGOL 68RS (a portable implementation of ALGOL 68 , following on from ALGOL 68R developed by RRE ), Coral 66 , radial basis function networks , hierarchical self-organising networks ( deep autoencoders ), the VIPER high-integrity microprocessor,

2208-414: Was later subdivided as Class D ( 1110 ) for multicast addressing, while leaving as reserved for future use the 1111 block designated as Class E. This architecture change extended the addressing capacity of the Internet but did not prevent IP address exhaustion . The problem was that many sites needed larger address blocks than a Class C network provided, and therefore they received a Class B block, which

2256-525: Was reportedly targeted multiple times in a cyberattack in which personnel and their bank details were compromised. While initial reports attributed the cyberattack to China , the Minister of Defence Grant Shapps said it would take some time to conclude who was to blame. Class A network A classful network is an obsolete network addressing architecture used in the Internet from 1981 until

2304-684: Was subjected to "grindingly repetitive" racist taunts from colleagues. In October 2009, the MOD was heavily criticised for withdrawing the bi-annual non-operational training £20m budget for the Territorial Army (TA), ending all non-operational training for six months until April 2010. The government eventually backed down and restored the funding. The TA provides a small percentage of the UK's operational troops. Its members train on weekly evenings and monthly weekends, as well as two-week exercises generally annually and occasionally bi-annually for troops doing other courses. The cuts would have meant

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