Voting to leave the European Union has cost Britain more than £200 million a week in lost growth, the governor of the Bank of England believes.

Mark Carney indicated during a private breakfast meeting with business leaders in Davos that the country had forfeited about £10 billion a year in GDP since the June 2016 referendum. The Bank has been careful not to quantify the effect of the Brexit vote to avoid accusations of political interference.

The subject came up when a guest at the breakfast asked Mr Carney what the “delta” of voting to leave the EU had been so far. In economics, a delta is a ratio used to measure the difference between actual and potential growth.

The guest requested that he measure