Thanks Gordon.
I've tried everything I can think of, but I didn't think of contacting the Church. I already have the children's baptisms - they were all on George's Discharge Papers, so I know when and where each child was christened.
One of the staff at Scotland's People has read through all the original Census Pages for Lapicide Lane for me and couldn't find anything either.

I don't think the Chissels were particularly 'Churchy' folk, but anything's worth a shot. If there was a Communion they may be listed but as I'm not really a 'Churchy' person either, I don't know any records of Communicants would be taken?
Thanks for your interest.
Anne