This might not mean anything, but there was a Tucker family in Chestwood Villas in 1942.
Clip from North Devon Journal 27 August 1942
Thanks bbart, that could be relevant. The letter with the signature was in the possession of my mother (now deceased) for many years, and I'm told that the names 'Bill' and 'Jonty' (not known whether this is a man or a woman) may have had something to do with the family in question. Perhaps 'Bill' is the 'William' referred to in the cutting? I've not completely given up on this line of research, but it is proving difficult.
Edit: I've managed to find the Tucker family in 1911 and 1939, together with various BMD records for Charles William Tucker and Camellia Tucker, but I've not been able to find a Philomena Tucker as yet. Philomena, Camellia - similar names ... ?