Dear Nicola,
Hi, I'm John Ierston from Chester
Just noticed your message from last March!
I suspect your grandfather Cyril might be a son of Charles Joseph Ierston. Charles was born in 1866 and married Sarah ( don't know the date ). Their children were: Vernon, Veda, Trissie, Iris,Nellie, Cyril, Marjorie - do any of these names mean anything to you? If so, I will send you the little information I know. There were 8 other siblings as well as Charles - my grandfather Bernard was the youngest. I've got some of the family history from Charles' generation (& immediate offspring) back to 1812 but have not been able to go further back. If you think the above is relevant, let me know and I'll send you what I've got.
Regards
John