Thanks herbie. I should hear back from my insurance company regarding the appeal I made over the next day or two. Fingers crossed I wont have to resort to pulling the phone apart. Pretty sure that the board is fried, so not sure what I would achieve anyway.
I've still got the phone and have had it in the boiler cupboard again inside a box full of rice, so if nothing else, anything that may have been in there will be long dried up by time I hear back. I'll pull it out after they get back to me.
I've just called them and they said that the phone was unrepairable and I should expect contact within 3 working days with either a replacement being sent out (reconditioned phone) or a cash payment to buy a replacement.
Just a few more days with a 3/4 year old HTC Wildfire then back to a speedy One X (or One if they make a cash offer!).