FCU 3506 (County of Northampton)
Blazon: In front of a Fetterlock Or a Lion rampant Gules
Link: This unit adopted as its badge a fetterlock to indicate the control it exercises over aircraft whose strength is symbolised by the lion.The lion and fetterlock have local associations as the former appears in the Armorial Bearings of the County of Northampton and the latter in those of the town of Northampton.
Date of Issue: July 1951 (E II)
Motto: Direct to kill
History: Formed at Market Deeping as No. 3506 Air Defence Unit on 8 January 1947, was renamed No. 3506 Fighter Control Unit on 29 September 1948 and disbanded on 31 January 1961
Sponsored by John Mandeville who served in the Unit