Chinese app seen as a potential security risk
'We are taking this very seriously,' Pompeo says
The meeting is now expected to be postponed on 11th March
US Secretary of State Mike Pompeo confident of US and UK resolving their differences
Mike Pompeo describes Huawei as a 'real risk' to security and tells foreign secretary Dominic Raab to reconsider its role in the UK's 5G and fibre networks