Air Photographic Intelligence Centre (UK) (JAPIC (UK)). In October 1947, APIC (UK) was renamed the Army Photographic Interpretation Unit (UK), (APIU (UK)) and, although it continued to operate within JAPIC (UK), had special responsibilities to the Director of Military Intelligence. The Officer Commanding APIU (UK) was also deputy commandant of JAPIC (UK). In December 1953, the unit was given the title of the Joint Air Reconnaissance Intelligence Centre (United Kingdom), (JARIC (UK)). The personnel of APIU (UK) were absorbed into the establishment of the joint service unit and the Army has continued to provide a number of PIs and supporting staffs in the JARIC establishment. JARIC moved in 1957 from its base at RAF Nuneham Park, near Oxford, to RAF Brampton. In 2012 JARIC was renamed Defence Geospatial Intelligence Fusion Centre (DGIFC) and moved to the other side of Huntingdon to RAF Wyton in 2013. The Joint School of Photographic Interpretation (JSPI) at RAF Chicksands – where PIs for all three British services are now trained has been named the 'Medmenham Training Wing' in honour of the unit's heritage with Medmenham. In 1952, 591 Signals Unit moved to RAF Medmenham from RAF Wythall and stayed until 1955 when it moved to RAF Digby, its current location. It was during its stay at Medmenham that the unit's crest was conceived; a kingfisher watching over the river (Thames), representing the unit's watch over the integrity and security of RAF communications. On 3 November 1958, RAF Signals Command (motto: Aetherem Vincere – "To conquer the upper air") was formed at Medmenham by raising No. 90 Group RAF to Command status under Air Vice Marshal Leslie Dalton-Morris. It was a relatively short-lived Command, lasting only until 1 January 1969, when it was absorbed by Strike Command and reduced to Group status. It had five Air Officers Commanding in Chief during its existence. RAF Radio Introduction Branch During the Second World War, an organisation known as the Post Design Services (PDS) was formed at the Telecommunications Research Establishment (TRE), Malvern, Worcestershire, to provide a direct link between the designers of electronic equipment in the laboratories and the service users in the field. The organisation was manned by civilian scientists ("boffins") and serving officers and worked predominantly in the fields of airborne radar and ground-controlled interception (GCI). In 1946, PDS was disbanded and a successor organisation, the Radio Introduction Branch (RIB), was formed at RAF Medmenham.