Yes I think that's what I'm going to have to do, truck it to someone and get them to investigate as I can't get the pulley off. The bolt will turn a bit both ways but then gums up which is probably the Loctite doing it's job.

Spoke to one lot yesterday whose name I won't mention and got the reassuring "Yep, crankshaft will be buggered and a new one is x number of dollars".
That's without looking they're going for the big dollars straight away. No wonder they've got a bad rep. and reinforces my opinion of them from some years ago.
I'll let you all know what the end result is.
Thanks for the replies.
Alan.