US President Donald Trump and British Prime Minister Boris Johnson onstage during the annual NATO heads of government summit on December 4, 2019 in Watford, England. France and the UK signed the Treaty of Dunkirk in 1947 in the aftermath of WW2 cementing a mutual alliance in the event of an attack by Germany or the Soviet Union. The Benelux countries joined the Treaty and in April 1949 expanded further to include North America and Canada followed by Portugal, Italy, Norway, Denmark and Iceland. This new military alliance became the North Atlantic Treaty Organisation (NATO). The organisation grew with Greece and Turkey becoming members and a re-armed West Germany was permitted in 1955. This encouraged the creation of the Soviet-led Warsaw Pact delineating the two sides of the Cold War. This year marks the 70th anniversary of NATO. (Photo by Steve Parsons-WPA Pool/Getty Images)
  • The Trump administration issued another warning to the UK over Huawei, via its ambassador to Germany.
  • Richard Grenell tweeted that Trump wanted to remind allies that dealing with Huawei would jeopardise intelligence-sharing.
  • Boris Johnson's decision to let Huawei develop Britain's 5G network angered the Trump administration.
  • The UK prime minister has cancelled a planned visit to Washington in March amid tensions.
  • For more stories go to www.BusinessInsider.co.za.

Donald Trump has issued another warning to Boris Johnson's UK government over its decision to defy the US and allow Chinese telecomms firm Huawei to develop its 5g network.

Richard Grenell, Trump's ambassador to Germany, on Sunday said the president told him to remind ally nations that doing deals with Huawei would jeopardise intelligence-sharing with Washington.

He tweeted: "Donald Trump just called me from AF1 [Air Force 1] and instructed me to make clear that any nation who chooses to use an untrustworthy 5G vendor will jeopardise our ability to share intelligence and information at the highest level."

It is the Trump administration's latest swipe at Johnson's government after the UK prime minister made the controversial decision to give Huawei a limited but significant role in developing Britain's 5G network.

Johnson went ahead with the deal despite US warnings that it could give the Chinese state access to western intelligence-sharing.

The Trump administration was angered by the decision, with the president himself reportedly expressing his disapproval before hanging up in an "apoplectic" phone call with Johnson last month.

Since the call, Johnson cancelled a visit to Washington which was penciled in for March, and has no plans to visit the US until the summer.

Trump's threats about Huawei reportedly "irritated" the UK government, with Johnson frustrated at the president's failure to suggest any alternatives.

Following the "apoplectic" call, US Vice President Mike Pence said the Trump administration had made its disappointment with the UK "very clear to them."

Australian MPs cancel trip to London over Huawei row

The US is not alone in opposing Britain's decision to deal with Huawei.

The Australian government also shares Washington's concerns. Its parliament's intelligence and security committee recently cancelled a trip to London amid diplomatic tensions with the UK.

Committee members planned to visit Britain in April to meet with their UK counterparts, but cancelled the trip, according to the Sydney Morning Herald.

Several members of parliament in Johnson's own Conservative party have expressed their concern about letting Huawei develop Britain's infrastructure.

Last month a number of them made pointed comments about Johnson's decision during a House of Commons debate.

David Davis, a former UK senior government minister, said the only way to protect UK safety from the potential threat posed by Huawei was to "ban it" altogether.

Conservative MP Julian Lewis said the Chinese company is "intimately linked with the Chinese communist state and its deeply hostile intelligence agency."

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