"We're supposed to be cutting public spending, and he goes and does something like this. Idiot!" said a furious Cameron this morning.
Observers have pointed out that the honeymoon period looks to be over, and that both Cameron and Clegg have started telling confidants of the others niggling habits that really winds them up.
An insider in the Libaral has been overheard saying that Cameron squeezes the toothpaste fron the middle of the tube, never tightens the lids on jars and bottles.
The Conservatives were quick to point out that Clegg leaves the toilet seat up and doesn't swill out the sink when he's had a shave.
More petty mindedness soon