Britain decided Tuesday to give Huawei limited access to build parts of its new high-speed mobile network, in a setback for the U.S., which has been pushing allies to ban the Chinese company. The government said it is excluding “high risk” companies from supplying the sensitive “core” parts of the new fifth-generation, or 5G, networks. But it will allow high risk suppliers to provide up to 35% of the less risky radio access network. The announcement did not mention any companies by name but said “high risk vendors are those who pose greater security and resilience risks to U.K. telecoms networks” – a clear reference to Huawei. The United States claims that China’s communist leaders could, under a 2017 national intelligence law, compel Huawei to carry out cyberespionage. Huawei denies that would be possible. The 5G infrastructure program is seen as being …