(July 14): The U.K. is poised to ban Huawei Technologies Co. from its next generation mobile networks under a two-step plan to protect critical systems from security threats, a person familiar with the matter said.

Under the blueprint, British phone companies will not be able to add any new Huawei components to their 5G networks by the end of the year. After that, all existing equipment made by the Shenzhen-based company would need to be removed from 5G infrastructure by 2027, the person said, speaking anonymously to discuss sensitive plans.