The PM’s spokeswoman said the government has done a significant amount of work into plans for a ‘no deal’ and she was confident there would not be a Brexit armageddon.
She said the Tories were working towards reaching a Brexit agreement by October and the June EU Summit was a staging post in that process.
The comments follow the release of report from civil servants drawing up scenarios for a ‘Doomsday Brexit’, which was leaked by Whitehall.
The study, revealed to the Sunday Times, said Britain could face shortages of medicine, fuel and food within two weeks of living the EU.
The report, drawn up by civil servants for Brexit Secretary David Davis, looked at scenarios for mild, severe and armageddon reactions to a no deal scenario.
It also said the port of Dover would collapse on the first day of a no-deal Brexit.
But a spokesman for the Department for Exiting the European Union also dismissed the claims, saying: “A significant amount of work and decision making has gone into our no deal plans, especially where it relates to ports, and we know that none of this would come to pass.”
At the time Jacob Rees-Mogg, leader of the pro-Brexit Tory European Research Group (ERG), hit back saying the report was “Project Fear on speed”, saying it was a “gamma minus piece of work” and “economically illiterate”.
He said: “It is a fallacy that countries will unilaterally decide to stop selling you their goods.
“The idea that food will not get through at Dover is entirely wrong.
“It will require either EU sanctions on the UK in an act of self-harm not to accept imports.
“It’s very very straightforward, it’s routine economics, it’s Project Fear on speed.”
Mrs May’s intervention comes after a shock survey showed nearly two-thirds of Tory activists had no confidence in her leadership in the Brexit negotiations.
While a former Cabinet minister claimed “negativity” at the top of the Government was hampering the departure, while a leading Tory donor called for the Prime Minister to be replaced by Michael Gove.
Theresa May has been hit with fresh Conservative attacks on her leadership as she attempts to steer the nation through its exit from the EU.
Former Cabinet Minister Priti Patel accused the PM and Chancellor Philip Hammond of “negativity” as they attempt to lead the country out of the Brussels club.