My landlord offered me the right to buy my house on condition that I made my mind up within ten days. I didn’t manage to sort it out in such a short space of time and he now says he won’t sell: can he just withdraw his offer like that?
Yes. Even if you’d turned up at his house the next day with a suitcase full of cash he could probably still have pulled out of the deal. Unlike most other contracts, contracts for the sale of land must be in writing, contained in a single document and signed, otherwise they can’t be enforced.