I'm sure i've mentioned this previously on mumsnet but I'll add it in here too for the kharma....
We had agreed to sell our place and MiL sell hers and we buy a place together so we could look after MiL who was getting pretty infirm. So both places on the market and we had an offer on ours, then MiL did on hers and then they pulled out. Second offer on MiL's and that fell through.
Finally a 3rd offer. Woman buying was a complete nightmare, needed something fixed, wasn't sure about this that or the other, on and on. What was worse was that this was a leasehold flat in an old vicarage and the freeholders lived in the ground floor flat but had only been there about a year so knew nothing about the place and had bought without getting all the right paperwork done.
So eventually woman buyer's solicitor said she needed a form from the freeholders to confirm everything that had been done to the place in the last so many decades. Which of course they didn't know. So we filled out the form as inlaws had lived there for 30 years. But the freeholders refused to sign it and so we had to go to their solicitor and pay £600 to get the solicitor to sign despite never even having seen the place. Finally, finally after months of frustration, me in tears at work every time I got a call from our solicitor, our buyer nearly pulling out after waiting for NINE blinking months!!! Finally everything was signed, sold, us moved into lovely new house. PHEW!
2 weeks later I got a call from the freeholders saying water was pouring in through their ceiling into their lovely newly renovated flat from MiL's old flat. They couldn't get hold of the woman who bought it as she was renovating before moving to the area. So freeholders were begging me to come and get let them in to the flat so they could turn off the water.
I have to admit I felt a bit sorry for them but pointed out that we didn't own the place and had handed over the keys to the estate agent so couldn't help. Much more pleading and crying "what should we do? you've got to help!!" Finally I said "well MiL did have a key safe by the door and I know we didn't take that key with us. I don't know if the buyer has changed the code but you could try 1234 and see if it works but I'm not saying you should" They hung up, obviously rushing off to see if this would work and apparently it did.
I did get an email later to say that woman buyer wanted to know why we had given the freeholders access so she could tell the police as she wanted them charged with unlawful entry. I didn't respond.