Or, at least, it would be a great story, if there was any truth in it. Because the truth is that, whether he is a fat old fool or not, John Prescott has never actually been left in charge of anything in Tony Blair's absense.
There seems to be an assumption on the part of the people writing this stuff that Mr Blair somehow ceases to be Prime Minister when he is on holiday. That might have been the case had we still been living in the era of carrier-pigeons, or when ocean liners were the only form of foreign travel, but not in an era of modern communications and transport.
Doutbless it won't stop the stories being written though, even if Mr Blair's decision to postpone his holiday means they have to be shelved for a few days.