Irish PM says call for new Brexit deal 'not in the real world'

British Prime Minister Boris Johnson's suggestion that Britain's withdrawal agreement with the European Union can be completely renegotiated in the coming months is "not in the real world", Irish Prime Minister Leo Varadkar said on Wednesday.

"Listening to what he said today, I got the impression that he wasn't just talking about deleting the (Northern Ireland) backstop, he was talking about a whole new deal - a better deal for Britain," Varadkar said of Johnson's debut speech as prime minister. "That is not going to happen."

"Any suggestion that there can be a whole new deal negotiated in weeks or months is totally not in the real world," said Varadkar, who was speaking in an interview on RTE television.