This is going to certainly test the grey matter. What we need are the names of the individuals and the location of where the image was taken. Clue you needed to be around in 1967-68 and there are two Communicators in the image. Click on image to enlarge.
Back row in the middle is possibly Grant Sweetman? Others identified are Lex Thayers the Cook, Trigger Gunn the Medic and Hugh Pocklington the RP.