Since the posting of my suggested answer to this mystery I have looked at my copy of The Victoria History of the County of Gloucester Volume V The Forest of Dean.
This tells us that the Holy Trinity Church, Drybrook was opened in 1817 and consecrated later the same year. It was built as a free chapel by its first minister Henry BERKIN then curate of Weston under Penyard who began holding services in the Forest in 1812 while at Mitcheldean.
We are therefore looking for a Mr CINDEREY of a generation before George.

Mike