Britain's poorest households will be the biggest beneficiaries of Britain's departure from the European Union, according to a report published by a prominent Labour group.

A paper co-authored by Labour Leave and a group of economists estimates that Brexit will bring a reduction in prices and immigration that will save the most deprived families £36 per week.

The group also warns that a "soft Brexit" would "leave us worse off and in danger of remaining in the EU in all but name."

John Mills, a prominent party donor who chairs Labour Leave, said the calculations in the report show that working class Labour voters "were right to back quitting the EU" because "they will see a boost to incomes that have been heavily depressed over the last decade".

The report comes as Caroline Flint, a prominent Labour pro-Remain MP, warns in an article for today's Sunday Telegraph that the party should stop "forecasting disaster at every turn" and start "preparing for life post-Brexit".