hi
Revisiting via new replies to posts

Its so difficult as Allen is quite a common name and I have no faith that any of the following belongs to your family, but here goes
There is an Allen family living at 22 GaRton Street, Leicester in 1891/01/11 head of household Sarah Allen, widow , children Ada and Robert. She is a grocer (possiblyconnected to coster mongering?)
Also a service record for a William Allen b1888 who married a Fanny Holmes in Dec 1911 in Basford.
Complete red herrings possibly.
Cathy