The United States warned the British government that “it would be crazy” to use Huawei technology on the UK’s 5G network.
A delegation from the United States presented new evidence to the United Kingdom that claims to show the security risks posed by the use of the Chinese firm.
The president of the United States, Donald Trump, has tried to pressure Prime Minister Boris Johnson on the issue.
A decision is expected this month on whether to allow Huawei to supply some “non-core” parts to the UK network.
A US delegation headed by Deputy National Security Advisor Matt Pottinger met with ministers in London on Monday.
Senior US officials delivered a dossier of technical information that, according to sources, challenged the British technical intelligence assessment itself that it would be possible to use Huawei on the 5G infrastructure without risks to national security.
US sources declined to comment on the content of the file.
The move looks like the last round in an intense lobbying effort by the Trump administration while the UK government prepares to make its decision on the 5G network.
Last year, the United States banned companies from selling components and technology to Huawei and 68 related companies, citing national security concerns.
The United States previously warned that any use of Huawei would lead to a review of the intelligence exchange.
However, UK officials have suggested that they are not concerned that such a review leads to a substantial change in behavior.
MI5 chief Andrew Parker told the Financial Times that “he has no reason to think” that the UK’s intelligence exchange relationship with the US. UU. It would be negatively affected if Britain used Huawei technology.
A spokesman for Huawei said: “We are a private company that has supplied 3G, 4G and broadband equipment to UK telecommunications companies for 15 years. British experts are clear that our technology does not represent a security risk.”
Meanwhile, conservative MP Bob Seely said that Huawei “for all intents and purposes is part of the Chinese state” and that an agreement with the tech giant would allow Beijing to access the UK network.
He called on the Parliament’s Foreign Affairs Committee to open an immediate investigation into the suitability of the company to build parts of the UK’s 5G infrastructure.
A government spokesman said: “The security and resistance of the telecommunications networks in the United Kingdom is of the utmost importance.”
“The government continues to consider its position on high-risk sellers and a decision will be made in due course.”