Michael Gove has slated the Labour Party's Brexit policy, joking that it was "as clear and straightforward as an apology from Vicky Pollard".
The cabinet minister said Jeremy Corbyn's plan to hold a second referendum with a choice of a Labour-negotiated deal or remain if victorious at the general election was going back to "square one".
"He wants to go back to square one, renegotiate the whole Brexit deal - when we've got a great deal with Boris - then bring it back on a referendum. He won't even say whether or not he'll back his own deal," Mr Gove told talkRADIO's Julia Hartley-Brewer.
Shadow cabinet members Diane Abbott and Emily Thornberry have both pledged to campaign to Remain instead of backing any Labour Brexit deal in a second referendum, causing division within the party.
Mr Gove continued: "Even before he has begun to negotiate, Diane Abbott and Emily Thornberry have said they'll vote against any deal he brings back.
"Well, if Diane Abbott cannot trust Jeremy Corbyn to get a good Brexit deal, why should any of the rest of us?".
The Chancellor of the Duchy of Lancaster's comments come after the Prime Minister wrote to the Labour leader asking for a "clear picture" of his party's stance on Brexit.
He urged Mr Corbyn to "come clean", and set out what his "supposed Brexit 'deal'" entails.
"For months you have refused to say what sort of 'deal' you want with the EU," the letter read.
"Now the time has come for you to come clean, and explain what your plan really is so when the public vote on December 12th, they know what they are voting for."
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