https://www.theguardian.com/technology/2020/jul/18/pressure-from-trump-led-to-5g-ban-britain-tells-huawei

‘Geopolitical’ factors were behind the move, the company was told, with hints that the decision could be reversed in future

The British government privately told the Chinese technology giant Huawei that it was being banned from Britain’s 5G telecoms network partly for “geopolitical” reasons following huge pressure from President Donald Trump, the Observer has learned.