Former UK ambassador to US on Bolton's book

President Trump's former national security adviser John Bolton is a ''very credible witness'' and his allegations about the Trump administration should be believed, a former British ambassador to Washington said Friday.

Bolton's book about Trump's behaviour in the White House has caused a storm, with administration officials seeking to ban it claiming that publication could harm America's national security.

But the former ambassador, Nigel Sheinwald, said Bolton was a very credible figure.

The book would contribute to the view that Trump lacked a grasp of key issues, Sheinwald said.

"He subjugates everything to his own personal and ultimately electoral interest," he added. "He's not interested in policy."

Sheinwald, who served as ambassador to the US between October 2007 and January 2012, said there was widespread concern over Trump's handling of the coronavirus pandemic and the anti-racism protests sweeping the United States.