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No.527 Squadron was a radar calibration squadron formed to serve in the south of England and East Anglia, but whose area of operations eventually extended up to the north of Scotland.
The squadron was formed at Castle Camps (Cambridgeshire) on 15 June 1943, and used its Blenheims and Hurricanes to fly radar calibration sorties in East Anglia and the south of England. Hornet Moths arrived in December 1943, and Spitfires in July 1944.
On 1 September 1944 the squadron absorbed No.528 Squadron, gaining Oxford aircraft and Lincolnshire as an operational area. The squadron retained these duties until 1 May 1945, when it absorbed No.526 Squadron, taking over its radar calibration and communications duties in the north of Scotland. The squadron was disbanded on 15 April 1946.
June 1943-May 1945: Bristol Blenheim IV
June 1943-April 1944: Hawker Hurricane I
December 1943-September 1944: Hornet Moth
February 1944-April 1945: Hawker Hurricane IIB
July 1944-April 1946: Supermarine Spitfire VB
September 1944-April 1946: Oxford II
April 1945-April 1946: Vickers Wellington X
May 1945-April 1946: Dominie I
June 1943-February 1944: Castle Camps
February-April 1944: Snailwell
April 1944-November 1945: Watton
Squadron Codes: WN
1943-1946: Radar Calibration squadron