Such is the desperation of the London property market that freeholders are flogging off basements to create leasehold flats.
All buyers have to do is provide their own spades and dig it out.
The Guardian ran story about a cellar in New Eltham that has just sold for £27,000, with one in central London selling for £150,000
Nigel S
Latest developments on Queen Court, Queen Square, Bloomsbury, London (mentioned in the Guardian article above) were covered by Telegraph on 2nd April.
http://www.telegraph.co.uk/news/2016/04/02/bid-to-build-basement-flat-beneath-existing-building-halted-afte/
Leaseholders face £40,000 legal bills for an injunction so far plus invalidated insurance and heating and hot water cut off. They have an RTM company. How much worse would it be without that?