Andy Coulson, Downing Street's former spin doctor, has compared the relationship between Ed Miliband and shadow chancellor Ed Balls to the "shamefully dysfunctional" Tony Blair and Gordon Brown partnership when Labour were in power.
He wrote in GQ: "The prime minister should pray Ed Balls remains shadow chancellor until the election. Appointing him as George's (Osborne) opposite number was the Miliband gift that will keep on giving...
"The Tories must look for the divisions and make the most of them a) because they are most certainly real - always a plus - and b) because it's history repeating itself. We are in this hole at least in part because of the shamefully dysfunctional Blair/Brown relationship.
"Labour's Two Eds dislike each other and each thinks he is smarter than the other.
"The Conservatives should imagine in some detail how it would work if they actually won...and share that vision with the British public."