I extracted these names ranks and groups from the March 1942 photograph before I had
computer support to pick people I could ask to write their memories of the period from
May 1940 to May 1942 they were at TRE.
I then added some extra people from 1941 photographs.
Sidney Jefferson suggested the group names to indicate the work being done.
Rowe still considered the ORS people to be members of TRE as he had set this activity up!
They thought otherwise.