"It is with regret that I am writing to inform you of my decision to resign as a Vice Chairman of the Conservative Party following the collective agreement by Cabinet on the Chequers Brexit deal.. I cannot support the direction of travel in the Brexit negotiations which, in my view, do not fully embrace the opportunities that Brexit can provide," Caulfield said in a letter to May.
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It comes a day after Boris Johnson resigned as UK foreign secretary and two days after the resignation of Brexit Minister David Davis over the disagreements with May in relation to the Brexit plan.
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