I've looked at the paper work and it appears that I did exchange contracts so that probably means I won't be able to forfeit the deposit and get out. I also discovered another aspect of the contract that shocks me. I did not purchase a car park space with the property. However, there is clause in the contract that states "Under the Terms of the Contract the Developer is to procure on your behalf an off-site car parking space at a fixed price of £1600 per annum for the first year (with ability to renew). The location will be as near to the development as possible".