David Cameron admitted there is a "fundamental disagreement" between himself and Nick Clegg, after the DPM revealed that his party will vote against proposed boundary changes.
But he maintained that they still had a good coalition relationship, stating that both parties were unlikely to agree on everything.
However, when asked whether he would prefer Clegg or Boris Johnson as his double skulls partner, the prime minister told LBC97.3 he would chose the London mayor.
He said Boris would have the "weight and strength".
On speculation about Boris's desire to be PM, Cameron simply said that the blonde-haired mayor had his term to serve.
Meanwhile, on Daybreak, Boris admitted: "I think it inconceivable I'm going to be prime minister."
Cameron also responded to criticism about the coalition scrapping school sports schemes and selling off 21 playing fields.
"Sport is part of the national curriculum and we want schools to deliver sport and I think that's very important," he said.
"And we're putting a lot of money… But frankly if the only problem was money, you'd solve it with money.
"The only problem isn't money. The problem has been too many schools not wanting to have competitive sport, some teachers not really wanting to join in and play their part…
"I've got an eight year-old and a six year-old and a two year-old and I want them to play competitive sport...
"It was a mistake that playing fields were being sold in the past. They're not anymore."
On the Olympics, the PM said that his son was so won over by Bradley Wiggins, he now wants to be known as "Elwen Wiggins".
He admitted he had a tear in his eye at the opening ceremony and praised the Olympic cyclists, in particular.
He even joked that the velodrome was more like the "pleasure dome".
Perhaps it was a reference to Xanadu, the poem by Samuel Taylor Coleridge…
And in an attempt to prove his own sporting credentials, the PM said he played cricket for his village the other day – but lost.