Why August 17? We're they self-funding until that point? I'm assuming you have had ongoing discussions with the la over the last 6 months? You may not perhaps want to share this info here and that's fine. But assuming there have been discussions and this didn't just come out of the blue, you need to talk to a solicitor who has some knowledge about this sort of case with your la : this probably isn't a case of just going with the person you used to buy the property, although they should be able to point you in the right direction.