nor should I tell the solicitor about them unless specifically asked.
You will be specifically asked.
I suggest that you are up-front about it, so that both parties understand the position from the outset. You don't want to be trying to negotiate this sort of thing at the last minute where "crisis management" is the only option.
The only things that I would ignore are like-for-like replacements, i.e. changing switches and light fittings.