Over the past four decades, economist Simon Wren-Lewis has worked for the UK Treasury, think tanks, and as an adviser to the Bank of England. He was instrumental in devising the tests that led the government to decide not to join the euro in 2003, and was key voice advocating for the formation of the Office of Budget Responsibility, the independent body that analyses the public finances.

The Oxford University economics professor writes an influential blog called Mainly Macro.