Thanks for all the feedback.
I've already gone and done it... I put a deposit on Lily Rose yesterday.
I offered the full asking price, subject to survey, as it had already been reduced by £5k when we saw it, but to include everything on board so I haven't got to go out and buy new stuff (no boat to transfer stuff from and not moving out of our house).
I've seen the 2014 survey (done when current owner bought the boat but now selling due to job loss) but I'm also trying to sort my own survey for additional peace of mind.
The external photos of the boat were deceptive in regard to tumblehome. It looked fine to me and the previous survey also confirmed this.
We looked at half a dozen boats in the morning in order to have something to compare Lily Rose to. One seemed pretty reasonable but no wow factor, one was ok but too small, the others looked well rough despite two of them being a bit dearer. However, these were all at Whilton Marina which I now realise is possibly not the best place to look for benchmarks but the process is easier there.
When we went to see Lily Rose it was a completely different kettle of fish. As soon as we saw it, inside and out, it just felt right. Even my wife, who was a lot less keen on buying a boat than me, said "I love this boat" within minutes of being on board.
Just gotta hope the survey doesn't throw up any serious issues.