After a couple of weeks on other things, I now have an answer to my original question - probably.
By a process of elimination I have concluded that the George I am seeking is most likely no 1 - son of Robert Church and Mary Palmer. The information that Jo offered goes a long way to corroborating this.
I have discounted no 2 (son of Richard Church and Betty Filer). One of the witnesses at their wedding was Samuel Filer, and their son George appeared in the 1841 census living with Samuel.
The information that Heather provided earlier in this thread convinced me to discount no 3 (son of William Church and Sarah Bendall).
I now have a definite thread to follow further, so thanks once again to all who helped me.
Alyn