I have decided to buy the freehold to my house. But my landlord has now informed me that the title deeds to the freehold have been lost, and he says he can’t do anything further.
I take it that your property isn’t registered at the Land Registry. In that case your landlord will have to do what any freehold owner who has lost the title deeds must do: apply to the Land Registry for a decision on ownership. In order to force your landlord to act you may need to make a formal application under the Leasehold Reform Act. If you’re determined to go ahead with this I suggest you ask a solicitor to deal with it, since the process is similar to buying your house all over again.