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Thanks all, and tony your post prompted me to search and I have found a copy of the agreement which has a 'Termination of agency' clause, allowing either party to withdraw from the agreement after giving 28 days notice in writing, which I guess is reasonable, and something I missed; the whole thing was done in a rush (never a good idea) as I was leaving the next day. I'm not in any hurry to sell, so I shall leave it for now, and see how things develop. The asking price is £80,000, so a £2,000 fee, if it sells at that, represents 2.5%.