A British defense and security think tank has warned that it would be "naive" and "irresponsible" to let Chinese telecommunications company Huawei supply equipment for the U.K's ultra-high speed 5G mobile networks.

Huawei, the world's largest producer of telecoms equipment, has been under the spotlight over allegations that the Chinese government could use its equipment for spying.

The United States has urged its allies to boycott Huawei technology over the alleged security threats that might compromise foreign communications networks. But the Shenzhen-based company and the Chinese government say those concerns are unfounded.

"Allowing Huawei's participation is at best naive, at worst irresponsible," according to a report by the Royal United Services Institute. The Financial Times first reported on the story on Wednesday.