May said both she and Raab will be supported by the Cabinet Office's Europe Unit, with the unit having overall responsibility for the preparation and conduct of the negotiations, drawing upon support from the Department for Exiting the European Union (DExEU) and other departments as required.
Mr Raab insisted the new arrangements were aimed at ensuring a coherent approach.
He said: "We need to be focusing on the intensification of negotiations to try and find the solutions on a way forward as opposed to the sort of tough stance that some people feel the need to take in relation to saying "well do your worst, we can deal with a [no-deal] situation".
"I think there are huge opportunities for us".
Meanwhile, efforts to fix the European Union's relationship with the White House will see Jean-Claude Juncker meet Donald Trump in Washington for talks on the trade dispute between the United States and its allies.
Secretary of State for Exiting the European Union Dominic Raab, made the statement as part of testimony to a Brexit committee in Parliament on Tuesday, July 24, although he emphasized Britain would not be stockpiling food.
Part of the Government's planning involves securing supplies of food and medicines.
The new Brexit secretary Dominic Raab told MPs that the move was necessary to "ensure the statute book functions properly" in accordance with the agreement the United Kingdom has made with the EU.
Image Dominic Raab and OIly Robbins were quizzed by MPs
But he said the plan was a "road map" to the "sunlit uplands" of a final deal which respects the referendum result.
It came as the government used the last day of the parliamentary term before the summer recess to publish details of legislation that will implement a withdrawal agreement.
Raab met Michel Barnier, the EU's chief negotiator, for the first time on Thursday and is due to go to Brussels next week for more discussions.
And he repeated his warning that the United Kingdom could withhold payment of its £39 billion "divorce bill" if the European Union fails to reach agreement on its future trade relationship with the UK. "Now we're going to be wasting money on a whole department to prepare for the increasingly likely no-deal nightmare".
The documentsays that while suspension of controls could be seen as sensible contingency planning - for example if there are any delays to imports of perishable foods at the UK's borders - it could signal a "cavalier approach to public health" that in turn could threaten exports from the United Kingdom to the EU.
"Britain's banking industry will emerge largely unscathed from Brexit and retain its position as one of the world's top two financial centres for the foreseeable future, Barclays" Chairman John McFarlane told Reuters.
"From the 30th March 2019 until the 31st December 2020, common rules will remain in place".
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