Newspaper headlines: 'BoJo Brexecuted' on Tory 'Day of Treachery'
"Brexecuted", "Tory Day of Treachery" and "The Real Game of Thrones" - a dramatic twist in the Conservative Party leadership contest demands headlines and front pages to match - and Friday's newspapers duly deliver.
The Daily Mail describes Thursday's events - during which Michael Gove surprisingly announced he was standing for the Tory leadership, rather than supporting Boris Johnson's campaign - as the party's "most savage blood-letting since the fall of Thatcher".
"On a day of extraordinary bitterness, Michael Gove knifed Boris Johnson in the back - ending the former London mayor's dream of becoming prime minister," it says.
"Mr Gove was accused of treachery and of presiding over an 'orchestrated plot' to destroy his fellow Brexiteer."
'Knifed in back'
The events were summed up by Metro as a "dramatic plot twist" straight out of popular TV drama "Game of Thrones".
"The blond Brexiteer had spent the week at the Palace of Westminster readying his troops to go into battle with rival Theresa May.
"But just hours before he was due to stake his claim to the Conservative crown, he was knifed in the back by his trusted friend and ally in the Leave campaign, Michael Gove."
The Daily Telegraph says Mr Johnson learned shortly after 9am that he was the "victim of the most spectacular political assassination in a generation" when the justice secretary publicly announced his intention to stand.
The paper's Gordon Rayner writes: "With two hours to go until the launch of Mr Johnson's leadership bid, Mr Gove, the man who was supposed to be making up the 'dream ticket' with him, had not so much stabbed him in the back as run through him with a pikestaff.
"Having been comprehensively stitched up by his running mate and several other 'supporters', [Mr Johnson] threw in the towel, his ambitions in ruins."
The Guardian says Mr Gove "ambushed" Mr Johnson with his surprise entry into the leadership race, complete with a statement in which he "brutally cast Johnson as lacking the qualities and character to lead".
"From Brexit hero to zero in a week," declares the Sun's front page, followed by its main headline "Brexecuted".
"Seething Boris Johnson supporters blasted Michael Gove over his 'disgraceful betrayal' - with one tweeting: 'There is a very deep pit reserved in Hell for such as he'," it adds.
The i draws on a line made famous by Shakespeare's Julius Caesar with its headline "Et tu, Gove?".
It says that despite suffering an "extraordinary act of political assassination", Mr Johnson has not escaped criticism.
"Tory grandee" Michael Heseltine likened him to a general abandoning the battlefield at the first sign of trouble after "ripping the party apart", the paper says.
This theme is picked up in the Daily Mirror, which headlines its coverage "Justice! The shaming of Boris, the man who betrayed Britain".
The political writers' take
Philip Collins, in the Times: "Yesterday was one of the great days in politics. Brutal, tragic, farcical and dizzying.
"If you didn't find it fascinating and invigorating, then you don't like politics."
The Daily Mirror's Kevin Maguire:"Boris Johnson waited years for the ball to come loose from the Tory scrum then was too cowardly to pick it up.
"The burly loudmouth bottled the biggest game of his life after a tackle by Gove the Geek... the truth is when push came to shove, the blond ambition chickened out, fearing defeat."
The i's Andrew Grice: "The maxim that the front-runner never wins the Tory leadership election still stands; remarkably the favourite hasn't won since the 1950s.
"Boris made a huge miscalculation: by heading up the Leave campaign, he drew a target on his own back.
"Incredibly, his enemies have scored a quick and unexpected bullseye instead of overtaking him in the leadership race."
Daily Mail sketch writer Quentin Letts:"And so fell Boris the Brave, Boris the Bold, Boris the Brexiteer.
"Shambolic, heroic, flawed, magnificent.... a crowd-pleaser, a campaigner who electrified the public, had been seen off by the forces of greyness.
"The way he seduced the voters and made them laugh had secured him the envy of parliamentary colleagues. How they resent panache."
Sun editorial column: "Boris Johnson's lifelong dream is over. But history will remember him - and the country will one day thank him - for leading Britain out of the EU.
"His charisma, humour and eloquence would have been a great asset in Downing Street, but the job would have been a massive test of his attention to detail."
Trevor Kavanagh, in the Sun: "Thank goodness Boris Johnson is not going to be our next prime minister after all.
"It might have been a thrilling ride, but Britain risked ending up like our hero, dangling foolishly on a political zip-wire."
Macer Hall, of the Daily Express: "Crikey, jeepers and gadzooks, as the blond bombshell himself might say.
"Boris Johnson snuffed out his blazing ambitions with a moment of quite astounding political theatre.
"The master of the zip wire and the Boris bike may have just pulled off his most gob-smacking stunt yet."
One man's loss...
So what of Home Secretary Theresa May?
She also entered the leadership race on Thursday, along with Liam Fox and Andrea Leadsom, with Stephen Crabb having already announced his bid.
The Sun says she "stormed into pole position" in the race to be PM "after vowing to end Tory squabbles and pledging 'Brexit means Brexit'".
'Party in flames'
The Daily Express has Mrs May, 59, as the odds-on favourite, adding: "At Westminster, where gregariousness is prized, the shy Tory is accused of lacking warmth.
"But she is pitching herself as the hard-working and battle-hardened candidate."
The Daily Mail nails its colours firmly to the mast in a full page comment piece headlined: "A party in flames and why it must be Theresa for leader.
"With referendum wounds still raw, the markets jittery, the future uncertain - and Westminster increasingly resembling a madhouse - what the country needs most is a solid and steady hand on the tiller," it writes.
Labour Party 'not safe for Jews' blasts MP (Daily Mirror)
Wayne Rooney's Ibiza blowout (Daily Star)
Pause to remember
Despite the dominance of politics in Friday's papers, they find space to reflect on the commemorations of the 100th anniversary of the Battle of the Somme and the stories of some of those who died.
The five-month battle along a 15-mile front in northern France saw more than one million people killed or wounded on both sides.
Britain lost nearly 20,000 soldiers on the first day alone, making 1 July 1916 the deadliest day in the Army's history.
The Daily Mirror writes: "We must never forget the bravery of the young men who exactly 100 years ago today heard the whistles that would send so many over the top to an early grave.
'Slaughter not in vain'
"Many of the men who died did not have the vote and their suffering played a part in obtaining rights and freedoms we should cherish, respecting those who never grew old so that we may be free."
The Times says "the Somme was a slaughter, but it was not in vain", as it allowed Allied commanders to learn how to fight a mechanised war on an unprecedented scale.
"It was knowledge that ultimately helped to secure victory."
The account of Corporal George Ashurst, of soldiers waiting in the trenches for the detonation of a mine to signal their advance, is recalled in the i.
"There we stood, rather silently leaning against the side of the trench, wondering if we had much longer to live and suddenly brushing the ugly thought of death away.
"Just as the waiting was becoming unbearable, and the terrible strain causing some men to utter almost unnatural noises, we felt a queer, dull thud and our trench fairly rocked.
"A great blue flame shot into the sky... the great mine had gone up. It was 7.30. It was zero hour."