It's on! And this time it really will “all be over by Christmas”, as was the tragically optimistic claim in July 1914 when the First World War began.

Jeremy Corbyn finally woke up to his absurd position that having asked for a General Election countless times, his lame rejection of the opportunity had run out of road.

In the process, we have said farewell to one of the most unrepresentative, dissembling, duplicitous and disgraceful parliaments in memory.

This bunch of mostly hapless back-slappers received a simple instruction three-and-a-half years ago – to negotiate the UK’s departure from the EU.

Labour Party leader Jeremy Corbyn listening as Britain's Prime Minister Boris Johnson speaks

But the place was riddled with a platoon of arrogant, self-obsessed barristers and lawyers who would study the most obscure legal texts to ensure Brexit was blocked at every possible twist.

Courtesy of a book about Theresa May’s tenure as prime minister – May At 10 by biographer Anthony Seldon, to be published this week – we now know she wept when she heard the referendum result.

She approached the EU on her knees, seeing Brexit as a disaster to be managed rather than a cry from the heart of decent, ordinary citizens.

The subsequent years of betrayal and bickering have taken an unparalleled toll on politicians’ standing.

To go into an election in which the approval ratings of the three main party leaders are so abysmal is without precedent.

'Theresa May wept when she heard the referendum result'

In normal times, Boris Johnson’s plus 2% rating would see him being written off, but when it is compared with Corbyn’s minus 40% and Lib Dem Jo Swinson’s minus 18%, it puts him close to X Factor winner status.

I do understand that for many of you, the next six weeks will be unbearable.

Try to stick with it. It is absolutely vital to do your damnedest to stay tuned in. Particularly if the early skirmishes are anything to go by.

'Corbyn and his backers’ claim Boris Johnson would sell parts of the NHS to Donald Trump'

Take for example Corbyn and his backers’ claim that if Boris Johnson were to lead the Conservatives to victory he would promptly flog off parts of the NHS to Donald Trump.

Never mind that the Prime Minister denies the claim and the president also derides it.

The timing is far from perfect. But be in no doubt – Corbyn gaining power next month would be everyone’s Nightmare Before Christmas.