Hi Roger
Ah yes - I can see the 1901 entry - rag and bone man - much more interesting than the usual Ag labs
Still no luck with 1891 - sorry

I have found what could, I suppose, be William's parents just before he was born?
There's an entry for William Somerville aged 53 and his 20 yr old wife Sarah in the 1871 census record for Brighton
RG10 1079 Folio 10 Page 14William is from London St Lukes and Sarah is from Brighton. William sr (if that's who he is) is a dealer in bottled beer.
If any of this is useful, I'll send on the images
Regards
Angela