"The prime minister's attempt to dodge scrutiny shows how she holds the public in contempt", he said.
If her Conservative Party wins a majority, as surveys expect it to, May would not be required to call another general election until 2022.
The fear of future economic damage has been reflected mainly in the pound's weakness since the initial shock of the Brexit result last June, which saw the currency tank from the $1.50 mark to 32-year lows around $1.20.
One insider said Tory Remainers would be required to sign up to the package, "locking them in".
Mrs May is expected to use the manifesto to ditch a number of high-profile policies from the Cameron era.More news: Voters in Indonesian Capital Choose Governor
By contrast, Labour has struggled to form a strategy over Brexit, while Corbyn's left-wing leadership is opposed by many of his more centrist MPs.
At Prime Minister's Questions yesterday, Mrs May signalled a brutal election campaign that will target the Labour leader, telling MPs he was "simply not fit to lead" and claiming a Labour victory "would bankrupt our economy and weaken our defences". However, she faced accusations that she was dodging scrutiny after confirming that she would not take part in any televised election debates.
'We will be ensuring we negotiate the best possible deal with the European Union - a deal which will cover the various issues that people are really concerned about in terms of ensuring control of our borders, control of our laws, control of our money'.
She rightly says the country needs a positive response for the Brexit negotiations, repeating that the decision to leave Europe is irreversible. It will also send a message to the House of Lords that they can not get in the way'.
"She told the House of Commons: "[Jeremy] Corbyn, [Tim] Farron and [Nicola] Sturgeon want to unite together to divide our country, and we will not let them do it".More news: Japan's exports, imports surge in sign of renewed vigor
The SNP accused Mrs May of political opportunism but abstained in Wednesday's vote.
Dominic Raab, a former Tory justice minister, also welcomed the plan, saying: 'It is a sensible move, which is consistent with the pledges the PM has made.
"If you look at the timetable, had the election been in 2020 we would have been coming up to the most crucial part of the negotiations, at the end of the negotiations, in what would be starting to be the run-up to a general election".
Professor Martin Smith, head of the University of York's Department of Politics, said: "With a large Conservative majority, the government will be able to get through any Brexit deal". She said: 'A bigger majority will enable the PM to see off the Hard Brexiteers. The EU wants to first reach the outlines of a deal on the exit before any future relationship is discussed a relationship it insists must be seen to be inferior to full membership.
Theresa May fired the starting pistol on the Conservatives' election campaign by travelling more than 200 miles from Westminster to Greater Manchester to ask voters for a mandate to lead post-Brexit Britain.More news: Bill O'Reilly's statement following his firing from Fox News
British Prime Minister Theresa May has caused a major surprise with her decision to call a snap election with a short lead-in time of eight weeks to June 8, as she seeks to cement her government's position before Brexit negotiations really get under way.
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