Brexit and falling interest rates have left UK companies needing an extra £10 billion a year for the next decade to fix their pension deficits, according to estimates by accountancy giant PwC.

At the end of 2016, the firm's estimate for the total shortfall in the UK's circa-6,000 defined benefit pension funds was £560 billion. They had assets of £1,480 billion and liabilities worth £2,040 billion.