Mark Carney is facing questions over a “secret” trip to Silicon Valley for a meeting with the founder of Facebook.

The governor of the Bank of England flew to San Francisco in mid-April, where he met Mark Zuckerberg.

Two months later Facebook unveiled plans for libra, a cryptocurrency aimed at changing how money is moved around the world. Digital money is seen as a threat to the supremacy of global currencies like the dollar, euro and pound and could dilute the power of central banks.

According to the Daily Mail, Mr Carney’s staff changed his diary several times to accommodate Mr Zuckerberg’s schedule. The Bank of England refused to provide further details of their discussions.