David Cameron has ordered ministers to focus on dealing with devastating floods amid signs of government infighting and a "blame game" with the Environment Agency.
The Prime Minister rejected calls for EA chairman Lord Smith to be sacked immediately - and said everyone should "get on with their jobs" of helping those affected.
The comments, as Mr Cameron visited the badly-hit south-west of England, followed reports of a bitter clash between Environment Secretary Owen Paterson and Communities Secretary Eric Pickles.
Mr Paterson is said to have complained to Downing Street after his Tory colleague issued a barbed apology yesterday for relying on the agency's advice, saying he had "thought we were dealing with experts".
Both ministers have played down the apparent rift, insisting they are "working closely" to respond to the crisis.
But a furious Lord Smith has hit back at Mr Pickles, saying his staff know "100 times more" than any politician about flooding, and squarely blaming Treasury funding rules for the failure to dredge rivers.
Attempting to take the heat out of the spat this afternoon, Mr Cameron said: "I am only interested in one thing, and that is making sure that everything government can do is being done, and will go on being done to help people through this difficult time.
"This is a time for everyone to get on with the jobs that they have. This is not the time to change personnel here. This is the time to get on, do everything we can. I back the EA, I back the work they are doing.
"Everyone's got to get on with the jobs they are doing.
"There will be time later on to talk about things. Right now everybody's got to focus on the job in hand.
"That is the EA, every department in government, and let's not forget the emergency services and the army, who are doing a brilliant job."