Boris Johnson is preparing to allow controversial Chinese firm Huawei to win access to Britain’s future 5G telecoms network — endorsing the Theresa May decision that sparked a cabinet crisis.

Senior sources in Whitehall and the security services say the government is moving towards a decision that will see Huawei allowed access to the “non-contentious” parts of the network — a move that would put the UK on collision course with America, which has banned Huawei over fears that it is to close to Chinese intelligence agencies.

One source near the top of government said: “There have been further meetings about Huawei in recent days and the view that is forming is the same as the Theresa May view of the world, which was to