We are going through a house purchase, and I've just found out via a friend that our vendors have extended their garden onto a bit of 'spare land' at the back of the house that sits between a group of houses. They've built a large shed on it.
It turns out this bit of land is owned by someone, although they are no longer able to access it.
Should I mention this to the solicitor? I'm not sure what to do. I'm worried this could hold things up if I do.