I took these 2011+12. The outside plaque is on the Royal British Legion club. The others are within St Laurence's church. Winslow, Bucks.
Unfortunately one of several - another aircraft hit the Water Tower at Mursley and crashed in the vicinity - there's a memorial to that one too.
This tragic accident was discussed here http://ww2talk.com/forums/topic/20872-the-wimslow-tragedy-of-7th-august-1943/?hl=%2Bchandos+%2Barms