Believe it or not, it's been two whole years since the stamp duty levied on properties over £2m was ramped up to the eye-watering 7% mark.

Stamp duty receipts "so far this year have been much weaker than expected" says the OBR

After a 40% surge in the last year alone, a total of 35,000 prime homes are now due to be built in the capital over the next decade, with a combined floor area the size of the City of London and a sal…