Boris Johnson now has 'sound reasons' to keep Huawei out of UK 5G

Former MI6 chief said US sanctions on Huawei meant Chinese telecoms firm now posed security risks to UK

Boris Johnson now has sound technical reasons" to reverse his decision to allow the Chinese firm Huawei to play a role in building the UK's 5G infrastructure, a former head of MI6 said on Sunday.

Sir John Sawers said new US sanctions imposed on the company meant that allowing Huawei to expand its grip on the UK telecoms market posed security risks that did not apply when the government announced a compromise solution in January giving it up to 35% of the market.