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         Frisch-Peierls Memorandum
         UK Decides to Develop Nuclear Weapons
         Aldermaston Airfield Taken Over
         First UK Nuclear Device Successfully Detonated
         Blue Danube Nuclear Bomb Delivered to RAF
         Grapple Series Begins at Christmas Island
         UK/US Agreement
         Red Beard (tactical) Enters Service
         Yellow Sun MK.2 Enters Service
         Blue Steel Nuclear Missile Enters Service
         UK Mounts First Underground Nuclear Test (UGT)
         WE 177 Free-Fall Bomb Enters Service
         First Polaris Subarine - HMS Resolution - Operational
         UK Starts Chevaline Programme
         Pochin Report Recommends Improved Safety Procedures
         HELEN Laser Opened by HM the Queen
         Mogul-D Commissioned
         AWRE Becomes Atomic Weapons Establishment (AWE)
         Government Announces AWE to be 'contractorized'
         Hunting-BRAE Ltd. Awarded Phase 2 Management Contract
         Cray C98D Super Computer Installed
         Plutonium Facility A90 Fully Operational
         North Ponds Water Management System Commissioned
         Fiftieth Anniversary of Opening AWRE Aldermaston
         AWE Management Ltd Win Management Contract
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We 177 Free-Fall Bomb Enters Service

The decommissioning team at AWE Burghfield with the last WE 177 to be broken down, pictured in 1998.
The decommissioning team at AWE Burghfield with the last WE 177 to be broken down, pictured in 1998.

In the late 1950s, the Chiefs of Staff had identified a need for a multi - purpose nuclear weapon which could be deployed with the low level attack aircraft TSR-2, then under development.

Despite the eventual cancellation of TSR-2 , development of the bomb went ahead. Known simply as WE 177, it was lightweight and versatile - the first of a new generation.

At Aldermaston, warhead design was pursued with urgency. On 1 March 1962, 1200 feet below the Nevada Desert, the test device was successfully detonated in the first of Britain's underground nuclear tests, codenamed Pampas.

Access to the Nevada Test Site was one of the benefits flowing from the 1958 Agreement. Later that year, AWRE's warhead designers were able to advise their Director, Dr. N. Levin (William Penney having left in 1959) that such a weapon could be produced by 1966.

The first WE 177 (the thermonuclear Type B) was delivered to RAF Cottesmore in September of that year. A single stage version (Type A) was delivered to the Royal Navy in 1972.

Over the following years a remarkable range of aircraft was fitted to carry the weapon. They included the Vulcan, Jaguar and Tornado and - in the Naval role - the Sea King, Scimitar, Buccaneer and Sea Harrier. By the time of its final withdrawal in 1998, WE 177 had been in service longer than any other British nuclear weapon.