Prime Minister Boris Johnson discussed telecoms security with US President Donald Trump as he prepares to announce if Britain will use China's Huawei in its 5G networks, officials said yesterday. In a phone call on Friday evening, the two leaders "discussed a range of issues, including cooperation to ensure the security of our telecommunications networks", a Downing Street spokeswoman said. A White House statement also confirmed they discussed "working together to ensure the security of our telecommunications networks". The United States has banned Huawei from the rollout of its next generation 5G mobile networks because of concerns -- strongly denied -- that the firm could be under the control of Beijing. Washington has been lobbying London to do the same, but there is speculation that it will grant the firm some kind of limited access.