John Prescott accused Mr Brown of sulking during meetings
Foreign Secretary David Miliband has denied claims that Gordon Brown is "annoying and prickly", made by former deputy prime minister John Prescott.
Mr Prescott also writes in his memoirs, serialised by The Sunday Times, that Mr Brown had often sulked silently during meetings when he was chancellor.
But Mr Miliband told BBC One's Politics Show: "I don't recognise the portrait John Prescott has set out."
The Tories said Labour was "sinking in a morass of recriminations".
In his memoirs, Mr Prescott says Mr Brown, when chancellor under Tony Blair, would sulk silently in meetings so often they had to be abandoned, while on other occasions, he could "go off like a bloody volcano".
Mr Prescott adds that he brokered "hundreds" of reconciliation sessions and phone calls between Mr Brown and Mr Blair.
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