resulting devices, such as Mandrel, Carpet, Piperack, and Jostle, were carried or used by aircraft of No. 100 Group RAF for radio countermeasures and ECM purposes to combat the increasing German night fighter force then opposing the RAF night attacks on Germany. Cathode ray tubes, for radar display, and a variety of electronic components were developed under direction of Geoffrey Dummer. Flight simulators were developed by A.M. Uttley. Electronic computer systems were developed by Philip Woodward. In 1942 the staffing level was about 2000 people; by 1945 increased electronics production had increased this number to around 3500 staff. Successor organisations TRE was combined with the Radar Research and Development Establishment in 1953 to form the Radar Research Establishment. This was renamed the Royal Radar Establishment in 1957. It became the Royal Signals and Radar Establishment in 1976 when the Army Signals Research and Development Establishment (SRDE) moved to Malvern. It was made part of the Defence Research Agency (DRA) in April 1991. This was renamed Defence Evaluation and Research Agency (DERA) in April 1995. In July 2000 it was split into two entities comprising the private sector company QinetiQ, and the wholly government owned Defence Science and Technology Laboratory (Dstl). Staff and their contributions Staff were affectionately known as boffins. They included: Joe Airey MBE Joined radar radio research in 1924. Worked at various TRE locations. Responsible for masts and other equipment. Was Senior Technical Officer at the time he was awarded the MBE. Rose to Station Manager RSRE by the time of his retirement. James Atkinson. Worked, at Malvern, on Cathode ray tubes, Chain Home stations, radar, super-refraction and infra-red detectors; later, at the University of Glasgow on nuclear photo-disintegration; and in administration at UKAEA Dounreay, the British Ship Research Association and Heriot-Watt University. C. E. Bellinger was one of the people "all of whom achieved eminence in their respective fields". Alan Blumlein, electronics pioneer. Starting in 1924, he worked on telecommunications, sound recording, stereo and television at Columbia and then EMI. While attached to Malvern, he developed the line type pulse modulator, a key element of the H2S airborne radar, vital to bombing missions. He died in the crash of an H2S test flight in June 1942, together with fellow TRE/EMI personnel, F/O Geoffrey Hensby RAFVR, B.Sc. Hons, Cecil Browne and Frank Blythen. Henry G. Booker, radio-physicist. From 1933 until World War II he worked in the radio-physics