How much will the Duke and Duchess of Oxford be paying in rent at Kensington Palace or is it on the DHSS?

I believe they will be paying the British equivalent of 1 peppercorn Mr Snape. So, I'll wager this works out to about 2 organic potatoes per year. But do not jump to conclusions dear boy. I understand this will not be subsidised at all by the taxpayers and cannot be claimed as a tax deduction.