Congratulations Clive on another excellent yearbook, great articles, especially regarding Ted Powles and the recce trips from Kai Tak.
The original Lancaster prototype had a 100 ft wingspan, all other Lancs from DG595 onwards being 102 ft. Although BT308 had the triple fin layout of the Manchester 1, I am fairly sure the tail plane span was 33 ft from the start, I've never seen a picture which looks like the span was only 28 ft as the Manchester's was originally.
Although rear gunner James Flowers may have flown in a VN-N, it certainly wouldn't have been R5689 on page 11 which burnt out on September 19TH 1942, long before Flt Sgt Flowers enlisted.
A very good read nonetheless!