Brexit is going to make Britain worse off, according to an official report leaked to Buzzfeed News.

The report looked at the three most likely scenarios when Britain departs the European Union, and concluded that in each one the UK will become poorer.

The impact assessment also claimed that every region — and almost every sector — would be negatively hit.

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Buzzfeed News reported that key ministers were secretly presented with the findings this week, ahead of a meeting next week with the Brexit cabinet subcommittee. A source from the Department for Exiting the European Union (DExEU) reportedly told Buzzfeed News that its conclusions weren’t shared publicly “because it's embarrassing.”

The report, called “EU Exit Analysis — Cross Whitehall Briefing”, examined the next 15 years and modelled each scenario, calculating the hit to growth in comparison to current forecasts.

It assumes that a trade deal with the US will exist across all scenarios, increasing GDP by 0.2% over the long term. However, all supposed benefits — including trade deals with other non-EU countries and deregulation across employment law, product standards, and the environment — would struggle to mitigate the losses from leaving the customs union and the single mark, says the report.

These were the three models on the table:

No deal

Means: The UK does not complete a deal with the EU, and reverts to World Trade Organisation (WTO) rules.

Growth lost: 8%

Comprehensive trade deal

Means: The UK successfully negotiates a new arrangement with the EU outside the single market — and successfully negotiates with non-EU countries as a result.

Growth lost: 5%

Continued single market access

Means: Britain continues to trade with the EU in the single market as a member of the European Economic Area.

Growth lost: 2%

Across every modelled scenario, the report found that almost every sector of the economy would be hit hard — excluding agriculture if WTO rules were adopted. Every single region would also suffer economically, with a real risk that London’s finance community could be “severely eroded”.

However, ministers have played down the report — with Brexit minister Steve Baker saying the draft paper “requires further work”, is nowhere near ministerial approval, and “does not yet take account of the opportunities of leaving the EU.”

“The article is a selective interpretation of a preliminary analysis,” Baker told the House of Commons. “It is an attempt to undermine our exit from the European Union.”

Conservative MP Iain Duncan Smith earlier said that the report should be taken "with a pinch of salt" on BBC Radio 4's Today programme — arguing that every Brexit forecast in existence had been wrong so far.

There is now building pressure from every major political party for the government to publish the report. A spokesperson for the Prime Minister said the she had briefed the cabinet on the leak this morning.

“No analysis was made of the bespoke arrangement we seek as a matter of government policy, as set out in the Florence speech,” the spokesperson said.

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Demand Equity

Brexit Will Make the UK Poorer in Every Scenario: Report

By James Hitchings-Hales