July 15 sounds like Ploesti, September 25 sounds like a Bulgarian 109, Wellington might be 205 Group, seems a bit late for Wellingtons though, maybe an SOE craft, or something from the Balkan Air Force, 37 Squadron perhaps.
Have a look here:
http://natureonline.com/37/42-op31.html
Wellingtons of 37 Squadron went to Sarajevo on 7 November 1944, (along with 77 other aircraft) losing 1 in Wellington action and another on return.