In remarks earlier this week, Johnson said he would rather die than remain in the EU after Oct. 31.

But with the hysteria surrounding the UK's seemingly never-ending Brexit negotiations once again on the rise, a former director of public prosecutions has told Sky News that Boris Johnson could go to prison if he refuses to delay Brexit in the face of court action or parliament passing the law.

Lord MacDonald, who held the senior prosecutor post between 2003 and 2008, said in this case, legal action would mean a court ordering that the law should be followed.

"A refusal in the face of that would amount to contempt of court which could find that person in prison," he said.

The cross-bench peer said this was "not an extreme outcome" as it was "convention" that individuals who refuse to "purge their contempt" are sent to prison.