Been trying to help with this one but I am also struggling to find a "failed to return" aircraft where LG Preece was a crew member (although I can find the two crashes listed in the previous thread)
However, there were two POW's named Preece; the first FL Preece (RAF 1487510) and the second LG Preece (RCAF J/86903)
Source:
Air Force POW index
Regards
Pete