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London is better-equipped to deal with the blow to the economy after Brexit than other UK regions, according to leaked impact studies.

The capital is better-insulated from the economic storm expected to hit Britain than anywhere else in the country, according to the documents produced by Whitehall civil servants.

Regions with high turnouts in favour of leaving the EU in 2016’s referendum, such as north-east England, are expected to be worst hit.

The controversial forecasts have been released after parts of them were leaked to the media and Labour and pro-EU Tory MPs called for their publication.

The figures showed that the north-east would take an 11 per cent hit to economic growth under the government's preferred outcome of a free trade deal with the EU, while leaving with no deal will result in a 16 per cent dip, and staying in the single market amounts to a three per cent decline.

In the West Midlands, a free trade deal would result in an eight per cent hit to growth, compared with 13 per cent under "no deal", and 2.5 per cent if the UK stays in the single market.

By comparison, London would sustain just a two per cent hit to growth if the UK gets a free trade deal, 3.5 per cent in a no deal scenario, and just one per cent if the country stays in the single market.

The latest forecasts are likely to be seized upon by backers of a "soft" Brexit to protect the economy, as Prime Minister Theresa May holds crunch meetings of her inner "war cabinet" of senior ministers on Wednesday and Thursday to thrash out what kind of trade relationship the UK will seek in negotiations.

Labour said the figures showed the government should "rethink" its approach to Brexit negotiations.

Paul Blomfield MP, Labour’s Shadow Brexit Minister, said: "The final Brexit deal with the European Union must work for every region and nation of the UK, protecting people’s jobs and local economies."

Liberal Democrat Brexit spokesman Tom Brake said the figures were “damning”.

In January, London Mayor Sadiq Khan his own impact assessments for the capital, which found that leaving the EU could lead to a £54bn blow to the economy.

Prime Minister Theresa May said earlier: “What matters is the positions we take in the negotiations as we sit down and negotiate the best deal. We've shown we can do that. We did it in December and we are going to do it again.”

A Government spokesman said: "This document does not represent Government policy and does not consider the outcome we are seeking in the negotiations.

"As ministers clearly set out in the House, this is provisional internal analysis, part of a broad ongoing programme of analysis, and further work is in progress.

"We are seeking an unprecedented, comprehensive and ambitious economic partnership - one that works for all parts of the UK. We are not expecting a no deal scenario."