Hi,
I have belatedly seen your post of 2005 ! A coincidence really as I was going through some family history with my sister today and Cyril is on the chart we have !
If I am looking at the correct Cyril, he was the son of Charles Joseph Ierston born 1866( farm bailiff) married to Sarah and who was himself the 1st son of 10 children of Thomas Ierston and Elizabeth Alcock. Thomas was a coachman at Hanbury Hall Nr Droitwich ( open to the public ). After his marriage to Elizabeth they moved to Birmingham and opened a tobacconists shop and outside catering business. Their last son Bernard born 1888 was my grandfather and presumably your Dads Uncle.Thomas also changed the name from Irestone to Ierston - allegedly at the time of the Finian uprising in Ireland.
Coming back to Charles, I believe that besides Cyril he & Sarah also had Trissie, Vernon, Nellie, Veda ( who I think emigrated to Canada), Iris and Marjorie.
I hope I have got the right Cyril - as you will see any Ierstons are related because of the change of name by Thomas. We are trying to construct a family chart so if there is anything you can add about Cyril or his family that would be great!. Hope this helps.
Regards John Ierston, Chester UK