We have accepted an offer on our house, and the buyer has commissioned a structural survey. A couple of years ago we had cracks appear when our neighbour did some building work, and clay soil subsidence was diagnosed by insurer, causing damage to front elevation. They decided primary cause was a tree on the street, monitored cracks for a year, tree was removed, crack repairs done, floors and windows replaced during the process. We now have all relevant certification that the issue has been addressed by tree removal. Property has now been reinsured twice with no issue. Not mentioned this at all yet to our buyer but assume this will certainly be discovered in a structural survey? Should we be upfront and mention it before everyone in our chain starts spending money on lawyers and surveys? Our buyer is savvy and I think possibly works in / has expertise in this area. I have met the buyer and feel it would be worse to be dishonest by NOT mentioning it at this point. Any expertise/advice on this situation much appreciated.