Gordon Brown is making mistakes because he doesn’t get enough sleep, a former No 10 aide has claimed.
Cabinet colleagues have long complained that the gruelling hours Mr Brown works affect his judgement.
They say the PM is worn out and makes things worse, not better, by working too hard.
Now Jonathan Powell, who was Tony Blair’s chief of staff, also claims Mr Brown would be better off getting a good night’s kip.
Tony Blair always boasted he slept well, despite the pressure of the job.
Mr Powell said: “I would always rather work and vote for a leader who sleeps well than one who wants to be woken all the time. Having been there, I think politicians get too little sleep. They need more time to rest and think.”
Ministers and aides who receive emails at all hours from the PM agree he would perform better if he took it easier.
Downing Street said Mr Brown would be taking a month’s break over the summer.
But the PM later insisted he would be taking just “a few days” off. He is also rumoured to have once set off a burglar alarm in Downing Street by trying to get into his office to work before it was unlocked.
One Cabinet minister said: “The problem is he thinks the answer to everything is to work harder. It would be much better if he got some sleep and had a clearer head.”
Cabinet ministers Peter Mandelson and Tessa Jowell have both been named as “nannies” responsible for trying to get the Mr Brown to go to bed at a reasonable time. Downing Street denied the claims.
Mr Brown has admitted getting little sleep but blamed his sons John and James Fraser.
He said one is an early riser while the other likes to stay up late.