London mayor Sadiq Khan revealed in a Q&A on LBC Radio on Friday that he has not spoken to the UK Prime Minister Boris Johnson since 10 May, which is also the last time the national emergencies committee Cobra met, despite the country facing “the biggest health, economic and social crisis since the Second World War.”

The politician, who previously served as an MP for Tooting, suggested this could indicate that the UK government “doesn’t like having their polices, their ideas challenged”, which he says often happens during Cobra meetings which deal with such crises as terrorist acts or natural catastrophes.

"The reason why Cobra is important, by the way Cobra works, we know it works because when there's a terror incident Cobra meets, and it's successful at dealing with terror incidents. We know that in the past during previous incidents, Cobras have met and have led to resolutions”, the mayor said.

He also referred to a regular Cobra session as “a grown-up conversation, [where] people are tested and challenged,” as the party politics is usually left behind the door. "And the only thing we can conclude from this is that the Government does not like being challenged," he added.