The United States has pushed Johnson to reverse his January decision to grant Huawei a limited role in 5G, while London has been dismayed by a crackdown in Hong Kong and by the perception that China did not tell the whole truth over coronavirus, Reuters report.

Britain’s National Security Council (NSC), chaired by Johnson, will meet on Tuesday to discuss Huawei. Media Secretary Oliver Dowden will announce a decision to the House of Commons later in the day.

The immediate excuse for the about turn in British policy is the impact of new U.S. sanctions on chip technology, which London says affects Huawei’s ability to remain a reliable supplier in the future.

It is unclear how far Johnson will go on Tuesday. Operators already had to cap Huawei’s role in 5G at 35% by 2023. Reducing it to zero over an additional two to fours years is now being discussed, although some telecoms firms have warned that going too fast could delay key technology and disrupt services.