He will argue that ending the current "groundhoggery" will deliver a big economic boost and enable the UK to focus on other priorities.
But former Tory David Gauke said Mr Johnson's plan will lead to a "bad outcome for the country". Labour said the PM's deal is flawed and has promised another referendum.
Jeremy Corbyn has said he would negotiate a better deal on the terms of the UK's exit and give the public the choice of whether to accept it or remain in the EU in a public vote next summer.
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