In September 1959 the Wireless Operators' School and the Aerial Erectors' School were established at Digby to begin training their respective students. The station continued to expand its scope of operations steadily from the 1970s and into the new millennium. British Army elements arrived in 1994 and were later joined by the Royal Navy. The addition of US detachments signalled the start of yet another era in the history of Digby. On 1 September 1998 399 Signals Unit merged with the newly arrived Special Signals Support Unit from Loughborough to form the Joint Service Signal Unit (Digby).