If the vendor pulls out of a sale after I have paid for a survey can I ask for my money back?
Unfortunately no, unless you have reached previous agreement with the vendor about the sharing of purchase costs.
A survey is an expensive and many purchasers leave it towards the very end of a negotiation so that they can be sure everything appears likely to go ahead subject to the survey results. However unless you have reached an arrangement with the vendors there is no legal right for you to recover your survey costs.
If however the vendor pulled out after exchanging contracts the cost of your survey and other legal expenses may form part of your claim for damages for a breach of contract.