Many thanks Morgan. It's good to know that you've come across quite a few errors on certifs. I must have been lucky in the past as all my certifs seem to have been accurate (or p'haps they haven't and I haven't even realised!).
That Evan James/Anne Price certif must I'm sure be the right Anne but with the incorrect maiden name. That certif didn't give an occupation for Anne but I have found Anne Price at the Post Office in 1890 (when she was a widow of David Price and not yet married to Evan James) and you found Anne James at the Post Office in 1895 (she married Evan James in Jan 1895) - so, surely it has to be the same woman.
Why couldn't I find those Jenkins/Davies marriages!?! The 1st one definately seems likely to be the correct one as their eldest child seems to have been born in early in 1860 or late 1859 (she was 1 on the 1860 census), so a marriage in early 1895 seems very likely.
I've just posted another letter to the registrars, with cheque enclosed. I've asked for the Price Davies marriage certif but only if the certif says "Anne Davies, formerly Jenkins", so if it does that will confirm that she was born Jenkins and did marry Thomas Davies, and also I think I can safely assume that she also married Evan James despite what the certificate says.
The Registrars took quite a long time to get back to me last time but they were really helpful so I'm sure they won't issue the certif if all its details aren't right. I shall keep my fingers crossed. Many, many thanks, I'll let you know the outcome.
Ninian