Compared with staying in the EU, the UK will be poorer economically under any form of Brexit, according to Treasury estimates.

The UK economy could be up to 3.9% smaller after 15 years under Theresa May’s Brexit plan, compared with staying in the EU, while a no-deal Brexit could deliver a 9.3% hit, the estimates say.

Independent experts have said that 3.9% of GDP would equate to about £100bn a year by the 2030s.

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Customers of Britain’s 7,000 biggest companies would be given the right to vote on the pay of top executives under plans for a clampdown on boardroom pay being considered by Labour.

A report commissioned by shadow business secretary Rebecca Long-Bailey, and John McDonnell, the shadow chancellor, calls for an annual binding vote on executive packages to include all stakeholders – including employees and consumers.