These two Knightsbridge properties totalling 14,000 sq.ft are owned by a member of Saudi Royal(royal, used advisedly) family.
For the last 20 years they have been left derelict and, according to nearby residents, rat infested.
We have a severe housing shortage in London.
A lesson needs to be sent to the desert dwellers that London is not a place to park their assets and, unless bought into housing use, will be taxed at multiples of their potential developable value.
It may not deter them but at least the profit stream could be used for benefit of genuine residents-not dodgy desert medievalists looking for bolt holes.