The White House has stepped up warnings to the UK about allowing Huawei into its 5G telecommunications networks, saying that any such move would pose a risk to MI5 and MI6, the British secret intelligence services.

Robert O’Brien, the US national security adviser, told the Financial Times that any UK government decision to allow the Chinese telecoms company to participate in the country’s ultrafast 5G networks risked giving the Chinese Communist party access to the “most intimate” details of British citizens and the ability to steal national secrets.

BL Premium

This article is reserved for our subscribers.

A subscription helps you enjoy the best of our business content every day along with benefits such as exclusive Financial Times articles, ProfileData financial data, and digital access to the Sunday Times and Times Select.

Already subscribed? Simply sign in below.

Questions or problems? Email or call 0860 52 52 00.