Ann Widdecombe has slated the Prime Minister's Brexit deal, branding it a "surrender" to the European Union.
Appearing on the Drive show, the former shadow home secretary told talkRADIO's Eamonn Holmes that since the EU referendum, the government had been too focussed on securing "a deal at all costs".
"The deal Theresa May has brought back is a surrender," Ms Widdecombe said.
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"It is saying we will stay in for as long as you demand that we should, and what's more, that we've got to obey your rules while we stay there - if that's her idea of a deal she shouldn't be in Number 10."
The former politician said she was not worried about a so-called "divorce bill" with the EU, but was concerned that if the UK remained tied to the customs union and single market, it would be "paying for donkey's years".
'Too easily adopted the scenario that we must have a deal'
Theresa May leaves 10 Downing Street. Image: Getty
"We too easily adopted the scenario that we must have a deal at all costs, whereas we could have spent the last two years preparing decisively to go without a deal which would have actually scared the EU because they are not going to benefit at all if they can't trade with us on easy and fluid terms," she told Eamonn.
A vote on the Brexit deal was meant to take place in the House of Commons today, but was deferred due to Ms May's fears it would be rejected by MPs.
Ms Widdecombe added: "There should have been just two things on the table, one the size of the divorce bill because we did take on financial commitments while we were a member. The other thing there should have been was trade after March 29. They were the only things that actually mattered."