Not to continually flog a dead horse
but if he wants to continue, and lose himself more money, he is free to exhaust any avenue still open to him, until those are shut down too. What he can never do, now, even if he is right (TO avoid doubt, He isn't) is get a court order to get that house back. The best he can do is get damages, a monetary amount equal to his loss. However, since he has no case, or chance of success this is all moot. Except he needs to give up claiming the house is his. That house is now long gone, and legally owned by someone else, who is not a party to any action Tom may have against B&B and its successors.
Correctly or incorrectly, legally or illegally, Tom and B&B no longer own the home, and can no longer give it back, ever!! The best he cold get is cash to cover the value of the house, which in theory he can use to buy the house at auction.
What Tom should do, if he really believes he has a case, is to buy the house at current market value (At auction) and sue B&B for the cost to repurchase. Baring that, he is never going to get that house back, even if he did triumph in the courts (Which, again, he will not).
So Tom needs to leave the current owner, anyone looking at the house, and any new buyer alone, as they are not a party to his dispute, and the house is no longer an available remedy to Tom.
So, unless Tom buys 3 Ferne Chase at auction, he will never have an ownership interest in it again (Assuming the house isn't bought by some idiot with more money than sense, who is buying the house to give to back Tom).