Photo is most likely early April 1969 when G-ATMJ returned from its second lease to Jamaica Air Services (on 2/4/69 according to Air Pictorial). At a guess the Viscount was in limbo awaiting the "new" i.e. 1969 livery to be applied which involved the replacement of the BM logo with the "BMA Jet" insignia. I would assume the tail logo is a sticker rather than a metal plate. G-AWGV appeared in March 1969 with the same scheme on the tail:-
https://www.airliners.net/photo/BMI-...ount/1358406/L
The DC-3 was most likely Autair's G-APPO which sat around for a couple of years before getting broken up in Feb 1970.