Theresa May is under growing pressure to find and sack the minister, aide or official responsible for a national security leak that revealed the government will allow the Chinese firm Huawei to supply equipment for 5G mobile phone networks.
But deciding to ban Huawei entirely from the network would have risked slowing down the development of 5G and also upsetting China. He tweeted "There's a reason others have said no" referring to the US, Australia, and New Zealand. He posted on Twitter: "I fear this may prove to be a bad decision, with major strategic data security and contract issues".
Downing Street refused to comment on the report.
Meanwhile, the chairman of the Commons Foreign Affairs Committee, Tom Tugendhat, wrote to Sir Mark to say he had been contacted by "some of our closest allies and partners" expressing their concerns at the leak.
Among the attendees at the NSC meeting were several of the candidates widely tipped to want the job: Foreign Secretary Jeremy Hunt, Home Secretary Sajid Javid and Defence Secretary Gavin Williamson.
Huawei has repeatedly denied concerns from the U.S. and some other nations that its equipment could be used to facilitate espionage by the Chinese government.
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The latest report from the National Cyber Security Centre (NCSC), which oversees the monitoring of Huawei's equipment, warned security flaws in the firm's products could pose a risk to national security.
The UK government is said to have agreed to let Chinese telecom kit maker Huawei join the building of non-core parts of the country's 5G network.
Huawei has recently faced allegations that it is linked to Chinese authorities and even has been spying on their behalf, although the company insists it is independent from the government.
"This is a thorough review into a complex area and will report with its conclusions in due course".
The UK government has launched an investigation into the leak of confidential discussions about the role of China's Huawei in Britain's 5G network, Reuters reported on Thursday citing the PoliticsHome website.
One imagines Levy finished many cups of coffee while writing the piece but it's a very good long read on how the United Kingdom reached its current position on the thorny Huawei question.
5G requires a vastly different network architecture to 4G and other previous mobile networks, which is why the decision to limit Huawei to supplying some but not all aspects maybe become problematic to police.