"Graeme Wall" wrote

More to the point, the Victoria line was deep enough that subsidence was
not
though to be a problem. Also the legal situation had been clarified. ie
you
don't own the land under your property, unlike the USA. This enables the
Government to sell off the mineral rights.

AIUI you do own the land under your property. But parliament has
nationalised mineral rights, so you don't own those, and is willing to grant
compulsory purchase powers for a wayleave for a new underground railway. If
it goes under your property you'll be paid for the wayleave, but it won't be
very much as it will be assumed you don't have any other use for the land.

Peter