When Nick Clegg was told that Boris Johnson was no actually on the line, but had pre-recorded his message, the Deputy Prime Minister responded: "That's easy for him, isn't it?"
Boris, if you're listening - and I suspect he isn't - I think we have actually cut the amount of taxpayer money which is used to pay for the cars and everything for ministers by, I think, about 70%. We have massively slashed it and changed it.
Clearly, ministers - myself included - drive in cars, but not all the time. I am about to jump into a train to go up to Sheffield this afternoon.
I think the fact we have cut the bill we inherited from Labour for ministerial cars by, I think, around 70% is a big step in the right direction."