Hi, and thank you for your quick and helpful response to my post!
It's a pity that parents' names were not recorded on marriage records of this time - it has become increasingly difficult to find proof of relationships as I've moved back in time with my family tree. However, even the names of witnesses may give a clue.
Thank you for clarifying the situation regarding OTP - I wasn't sure whether the bride and groom had to be born in the parish for this to apply.
The lack of age on the burial record of Abel Lillystone on 19.1.1766 is also frustrating. It seems likely that this person was related in some way to my 6x great-grandfather but without an age, it's difficult to know how. I think that my Abel Lillystone was buried on the same day, in Feb 1789, as his wife, Elizabeth (Blomefield). I believe they were paupers and may have resided in the workhouse, but that's another line of investigation!
Thanks again for your help.