Agreed - survey contains a pretty standard para about increased risk of sulphate attack in properties around the 1950's- but not specifically IN this house. In fact, the surveyor states " no significant evidence" in relation to my house, and then this, "no sign in internal floors, external walls, etc etc". I am arguing that why then, would I agree to invasive and costly core test!? Are my buyers REALLY that concerned, or using this as a ploy for renegotiation of price?? I think I know the answer and have asked them to accept the ACTUAL advice from surveyor or move along and buy something else. The survey says they, " MAY" wish to get test done, not that surveyor deems it essential before proceeding. The request does not appear to be driven by mortgage provider but from buyer and over zealous solicitors. Unfortunately for them, we are able to tap in to alternate funds to allow our onward move. We informed them of this on Friday and awaiting response. HA, this was a couple who repeatedly upped their offer during a bidding war originally and wrote us a long impassioned letter asking for us to consider their offer favourably as they so loved and wanted the house!