Sadiq Khan has commissioned his own assessments of the impact of Brexit on the economy after the Government admitted it has done no such studies itself.

The Mayor of London said he had been forced to act by the “outrageous” omission and has requested comprehensive studies on the effect that Britain leaving the EU will have on nine key economic sectors.

Among those to be assessed are financial services, construction and the creative industries, all of which are likely to be significantly affected by Brexit.

The other sectors to be covered are digital, life sciences, hospitality, culture, food and manufacturing, and science and technology.

The studies, which will be carried out by analysts at Cambridge Econometrics, will consider both the impact of Brexit on the London economy and its wider consequences for the rest of the UK.

They will assess a range of possibilities, ranging from the status quo to a hard Brexit in which Britain exits the EU without a transition period.

Despite having previously suggested that impact studies have been carried out, David Davis, the Brexit Secretary, told the Brexit Select Committee earlier this week that there is “no such systematic impact assessment”.

He added: “I’m not a fan of economic models because they have all proven wrong.”

Brexit bonhomie as May finally seals agreement with EU leaders Show all 10 1 /10 Brexit bonhomie as May finally seals agreement with EU leaders Brexit bonhomie as May finally seals agreement with EU leaders Britain's Prime Minister Theresa May is welcomed by European Commission President Jean-Claude Juncker Reuters Brexit bonhomie as May finally seals agreement with EU leaders EU President Jean-Claude Juncker greeting Theresa May at the EU Commission in Brussels PA Brexit bonhomie as May finally seals agreement with EU leaders Britain's Prime Minister Theresa May poses for a picture with European Council President Donald Tusk REUTERS Brexit bonhomie as May finally seals agreement with EU leaders EU Commission President Jean-Claude Juncker walks behind British Prime Minister Theresa May EPA Brexit bonhomie as May finally seals agreement with EU leaders British Prime Minister Theresa May (L) and European Commission President Jean-Claude Juncker address a press conference at the European Commission in Brussels AFP/Getty Images Brexit bonhomie as May finally seals agreement with EU leaders British Prime Minister Theresa May speaks at a press conference with EU Commission President Jean-Claude Juncker EPA Brexit bonhomie as May finally seals agreement with EU leaders Britain's Secretary of State for Exiting the European Union, David Davis (L) and Michel Barnier (2-L), the European Chief Negotiator of the Task Force for the Preparation and Conduct of the Negotiations with the United Kingdom under Article 50 enter the room by the emergency exit to attend British Prime Minister Theresa May press briefing on Brexit Negotiations in Brussels. EPA Brexit bonhomie as May finally seals agreement with EU leaders Britain's Secretary of State for Exiting the European Union David Davis (L), Britain's Prime Minister Theresa May (2-L), European Commission President Jean-Claude Juncker (2-R) and European Union's chief Brexit negotiator Michel Barnier (R) in a meeting on Friday morning AFP/Getty Images Brexit bonhomie as May finally seals agreement with EU leaders European Union chief Brexit negotiator Michel Barnier speaks during a media conference at EU headquarters Brexit bonhomie as May finally seals agreement with EU leaders European Council President Donald Tusk addresses a media conference at the Europa building in Brussels AP

Criticising the Government for a lack of preparation, Mr Khan, who is currently on a visit to India and Pakistan, said: “It is outrageous that the Government either failed to properly consider the impact of Brexit on Britain’s economy, or are refusing to release their analysis.

“If it’s the former then I question their competence. If it is the latter then I question whether they have something to hide.

“We need to know the impact of different Brexit scenarios on our economy in order to deliver a Brexit deal that protects jobs and growth.”

The UK has not conducted a Brexit impact assessment on any sector, says David Davis

The London Mayor’s announcement came hours after Theresa May and EU leaders announced they had reached a deal on the main issues that have arisen during negotiations: the future of the Irish border, reciprocal citizens’ rights and the size of the UK’s Brexit bill.

It means talks will now be allowed to progress to the second phase, which relates to the UK’s future relationship with Europe.

Despite the agreement making a Brexit deal more likely, Mr Khan said he thought the possibility of a second referendum on the final arrangement remained “on the table”.