Labour is considering offering a four day week to voters to win the next general election, John McDonnell has said.

The shadow chancellor said Labour will “look at the working week” as part of an examination of working practices ahead of drawing up the party's manifesto for the 2022 election.

The news comes after Frances O’Grady, the general secretary of the Trades Union Congress, last month said a four-day week should be “an ambition” for unions.

Labour is already said to be looking at how the rise of robots and artificial intelligence can be used to benefit workers rather than just those at the top of companies.

Speaking on the BBC’s Sunday Politics, Mr McDonnell said: “We will be exploring a whole range of issues about automation – we will look at the working week.”