Labour leader Ed Miliband has launched an attack on the coalition government following new leaked recordings of Lib Dem ministers criticising policy.
Miliband described Lib Dem ministers as a "useful prop" for the prime minister as he "seeks to pretend this is something other than a Conservative government".
Scottish secretary Michael Moore, business minister Ed Davey and pensions minister Steve Webb were taped by Daily Telegraph reporters posing as constituents.
The paper had previously taped business secretary Vince Cable saying he had "declared war" on Rupert Murdoch.
Moore described the increase in tuition fees to a maximum £9,000 as "the biggest, ugliest, most horrific thing in all of this... a car crash, a train wreck", the paper said.
"These are decisions of a Conservative-led government propped up by Liberal Democrat passengers," the Labour leader told a news conference this morning.
"Passengers not in the front seat, not even in the back seat of the car, passengers who have got themselves locked in the boot."
He said the revelations had shown the Lib Dem ministers agree "with us not them".
The Labour leader also said shadow business secretary John Denham would be writing to Cabinet secretary Sir Gus O'Donnell over the transfer of the media portfolio to Jeremy Hunt.
Miliband said he would seek reassurance that the culture secretary was a "fit and proper person" to arbitrate on News Corp's bid for BSkyB, given his previous comments on the issue.
He added: "There is material around what he has said about Sky and its role in the broadcasting ecology."
Miliband was speaking at the launch of a recruitment drive to encourage anyone under the age of 28 to join the party for a penny.
Launching the offer, Miliband vowed to fight for young people's priorities, telling them: "Join us and we will be your first line of defence."
He said Labour would not let young people carry the burden of the government's broken promises.
Shadow education secretary Andy Burnham accused the government of taking a clear choice to make young people, rather than wealthy bankers, bear the brunt of its programme of cuts.
Labour's 1p membership offer is available to people aged 27 or below until the May 5 elections to devolved assemblies and local councils.
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