rent to buy
によるポスト Alfredo Mendoza に イギリス フォーラム
Well I think they did not want to leave your house, so they are ready paying you the double amount for that. However, it completely depends on you whether you want to sell your house or keep it on rent.
However, for legal issues you can seek good professional advice that guides you in the right direction. If you are still finding it difficult then read out some hot tips for landlords at Plazaestates.co.uk. It can be of great help.