The French Foreign Minister Jean-Marc Ayrault called the newly appointed Foreign Minister of the UK Boris Johnson a liar and said that someone who is more credible should have taken his position, reports the Reuters. " I’ve got no worries at all about Boris Johnson. But … during the campaign, you know he told a lot of lies to the British people," said Ayrault. Yesterday, the former Mayor of London and the British Conservative Party member Boris Johnson became the Foreign Secretary of the UK. Johnson has been the main supporter for the Brexit.