Flying ceased at Digby when all units and training schools were disbanded or relocated during January 1953 and the station was placed on care and maintenance until October 1954 when building works commenced in preparation for the establishment of the proposed signals units. No. 399 Signals Unit arrived in January 1955 and declared itself fully operational on 15 February, located in No. 2 hangar (now the station gymnasium). The second, No. 591 Signals Unit arrived in July 1955 and set up operations in hangar No. 1 (North).