When buying any house that's previously been lived in OP, can I suggest that you don't just wander around for a few minutes, looking at the walls etc, but actually make a point of saying things like, 'you don't mind if I just flush the loo, run the taps, see the heating working, do you?' We had no idea about any of this stuff when we bought our first house, but I wouldn't buy any house now without running taps to check how long it takes for hot water to come through, that water pressure is good in general, and that the heating actually works, even if it is the middle of a heat wave, as all these things can cost an arm and a leg to put right. Also, don't be afraid to look behind furniture, to see if it's been placed to hide something like damp patches, wall paper coming away from the walls can be a sign of damp, as can bubbling paint, which a surveyor should tell you about, but they may not!! I'd also recommend that you open and close all windows to make sure there are no problems there, and in general, I would strongly advise making the absolute most of that second viewing, ie, don't be afraid to open cupboard doors, I didn't do that in one property, and although we were planning on replacing the kitchen, it quickly went up the list on the day we moved in, when I opened the first cupboard and the door fell off in my hand!!
While I would also recommend getting a full survey done on the property you chose, again, be fully aware that surveyors can, and do, miss things. Unfortunately, when we moved to our current home, it was a long distance move, so having spent several hours in the 2 properties that we bought, prior to agreeing to purchase, we hoped that we had spotted the main problems and relied on the surveyor to spot anything else. However, he didn't mention that there were bats in the roof, or, more importantly that the two oak supports which held up the upstairs balcony, were rotten right through! We'd actually walked out on the balcony when we viewed, but had we known how dangerous it was, wouldn't have even considered it! So of course making that safe became our number one priority on moving in. Unfortunately we were far too busy setting up a new business, at the time, to consider taking legal action against the surveyor, but probably should have done with hindsight.
Finally, if you're in ANY doubt, about ANYTHING that the mortgage advisor, survey report, or solicitor tells you, please don't feel too silly to ask, or think it won't matter. Buying any home is a SERIOUS business, so you need to fully understand what you're letting yourself in for. Good luck, and I hope you'll be really happy in your new home!