More pics of Commer Q2 radio vehicles, courtesy of Les Freathy.
As they seem to have post-war registrations, these were pics must have been made post-1949.
Editd to add: The second picture is captioned "Mobile D/F Station from the early early 1950s. On site in RAF Jever, Germany" at
http://www.vintageradio.me.uk/military/r1132_a.htm