Thanks all for you advice and your replies.
If anyone's interested I put an offer in this morning, but I'm led to believe by the estate agent someone else has too. Reading between the lines the estate agent pretty much told me the other person's offer which was ever so slightly higher that the one I put forward, but we're talking hundreds rather than thousands. I'm planning on matching this offer but leaving it at that.
The house is immaculate (the same can't be said for the girl who was also viewing at the same time as me) and I had a friend with me who knows about buildings, he said there's nothing major to worry about, but I'd get a survey done too.
See what happens . . . . .