Selling a house, how do i stand now?

Here goes. Accepted an offer on my flat(i own by myself) approx four weeks ago. Due to splitting up with g/friend we are no longer buying a house and i want to stay at my flat. Our offer on a house has only just been accepted, we havent signed anything so that wont cost me anything. However how do i stand with my flat? The prospective buyers have done survey searches etc. Will I be liable for these or any other solicitors cost? My solicitor charges a flat fee payable on completion but as im pulling out will i be liable. Advice and best ways to get out of it most appreciated. I live in England.