If we can't figure out how to prevent this for a given asset, we don't touch that asset.
But part one can be done many times before part two has to be done.
The NFT owner can then, at their option, pull the land out of the SPV (and the NFT is burned in the process!) to take ownership via the land register being updated.
The NFT purchase is still the transfer of the interest in the land, and the point where stamp duty is paid to the UK government. That's where the value transfer happens.
In other countries this could be similar to signing a contract to purchase land which creates interest and tax liability prior to entry in registry, but final source of who owns it in the end is a registry.
But yes: you have the token, you have the right to the thing, and the supporting legals implement consequences in the real world or on chain via escrows if that right is not met.
https://medium.com/union-finance-updates-ideas/union-partner... for example.