No, not Michelle. The presidential limo.

(Evening Standard) — Barack Obama has been ordered to pay the congestion charge for his security vehicle “The Beast”, Boris Johnson revealed today.

The Mayor told the Standard each car in the President’s motorcade will be billed for £10 – including the bomb-proof Cadillac. Mr Johnson also said he had a discussion with Mr Obama about the US embassy’s refusal to pay £5.3 million in C-charge fines.

But the embassy said its position on not paying the C-charge was “wholly in accordance” with a convention on taxing diplomats. Mr Johnson said: “Our roads were not closed during the President’s visit so his motorcade will pay. The Beast will pay the charge, I’m delighted to say.

“We didn’t charge the Pope when he was here because all the roads were closed, so the Popemobile was exempt. But this was different.”

Mr Johnson raised the issue of the US embassy’s unpaid C-charge bill with the President during a state banquet at Buckingham Palace. He said: “We had a very friendly conversation. Suffice to say discussions will be ongoing.”

A spokesman for the Mayor later said: “They already owe £5.3 million so it is probable the bill for the motorcade will just go on top of that.”