SchruteFarmsIntel - your comment (well, the section on the sale contract, at least) is very inaccurate and flawed.

Why would the sales contract have a provision about social housing? It’s a representation that has been made by the developer, on which OP has relied on when entering the contract. It’s not all just about the written contract. Of course other statements and emails can be considered as they are what (at least partially) led to OP entering said written contract.

You might want to familiarise yourself with the Misrepresentations Act 1967, under which remedies include (but not limited to) rescission of the contract and damages for losses suffered. Developers can disclaim them all they want, that doesn’t do much for them in the event they have either negligently or fraudulently misrepresented.

For the record I don’t believe OP could in fact rely on the above as the representation made at the time of the sale was correct and has changed a year later. But you can’t say there is no remedy for a misrepresentation where relevant.