Hello Derek
Thank you so much for your advice - it sometimes helps just to bounce ideas off other people.
I have managed to trace marriages for all children of William & Jane Ann Elizabeth (webster) and have traced them all on 1911 census with their spouse's so I don't think they have been replaced.
I am now attempting to find brothers and sisters of Jane Ann Elizabeth Webster as they seem to have a pattern where they have named after brothers and sisters. William had only 2 sisters Mary and Hannah but to put the cat amongst the pigeons his mother Martha remarried and went on to have more children

So far I have come up with a possible Arthur Rigley buried St Marys 18 September 1888 and another clutching at straws this time - Charles William Rigley buried St Marys 26 September 1886.
The family have lived in Ilkeston/Cotmanhay all their life and it is so frustrating that the Basford Regisration District covers such a wide area so we are unable to define BMD's in Ilkeston

I have found (on familysearch website)a baptism of Thomas Rigley baptised Cotmanhay 12 October 1879 and Martha Ann Rigley baptised Primitive Methodist Ilkeston Circuit 2 October 1867.
(Thomas was also called John Thomas and was killed in action in WW1)
Thanks again for all your help and advice.
Regards
Di