Thanks for the reply, I had forgotten about this post. Still not managed to find any descendants of Horace or Colin Allen.
I notice you have Cyril, son of John Thomas & Sarah Allen as being born 1918, he was born 1898. Horace Redvers and Colin are his siblings. You have got Cyril & Elsie's children correct except for one, that is the Cyril (my father) who was born 1918, so as you can see there are two Cyril's.
Could I ask if you are related to us Allens.