Newspaper headlines: Theresa May's Brexit 'letter to the nation'
Brexit dominates the front pages as Theresa May prepares for European leaders to rubber stamp her EU withdrawal agreement.
Several lead with Theresa May's "letter to the nation" urging voters to support the terms she has agreed.
The Mail on Sunday describes it as an "impassioned" plea, in which the prime minister "promises to campaign with her heart and soul to persuade MPs to vote for the deal".
The paper also says Number 10 is considering the idea of the PM challenging Jeremy Corbyn to a public debate on the agreement.
Meanwhile, the Sunday Express says she hopes pressure from the voting public "will persuade waverers in Parliament" to get behind her.
But the Conservative backbencher Jacob Rees-Mogg has warned that he and many other Brexiteers will not support the deal, the paper adds. And his colleague, the MP Ben Bradley, says he fears the deal could cost the party Leave-supporting seats.
The Observer sees the letter as an "increasingly desperate... attempt to go over the heads of warring politicians in her own party".
According to the paper, senior Conservatives who support both Leave and Remain appear to be "hardening their opposition" and "few see how she can avoid going down to defeat".
For the Sunday Times, the letter is part of a "two-week PR blitz to save her government from collapse" with Mrs May "facing a fresh Cabinet mutiny" from what it calls a new "gang" of five ministers.
The paper claims ministers from the Remain side are said to be "holding secret talks to force her to adopt a new plan B for Brexit". Chancellor Philip Hammond and Work and Pensions Secretary Amber Rudd are said to be among the five who will push for a softer Brexit if the current plan is voted down, the paper says.
A report of a "secret plan B" is also carried by the Sunday Telegraph, which says alternative proposals are being drawn up by both Cabinet ministers and EU diplomats because of "a growing assumption that Theresa May's deal will be blocked" in Westminster. It suggests 91 Conservative MPs have indicated they would oppose the deal.
The Mail on Sunday also speaks of "secret talks" between ministers and Labour party grandees to determine whether enough Labour MPs could be convinced to abstain in a second attempt to pass the deal through Parliament.
Allies of Chancellor Philip Hammond have told the paper that he and four other Cabinet ministers would quit if Mrs May moved towards a no-deal Brexit in the event that her current agreement was blocked.
The paper also says a no-deal Brexit could harm the drinking water supply, as water purification chemicals are imported from Europe. The concerns were enough to persuade Environment Secretary Michael Gove to back the withdrawal agreement, the Mail says.
The Observer reports that the prime minister "has been accused of betrayal" for her concession to Spain on Gibraltar, to secure its support for the Brexit deal.
Stewart Jackson - who was chief of staff to the former Brexit Secretary David Davis - tells the paper he believes the "Gibraltar surrender may be the straw that breaks the camel's back", condemning it as a "very foolish thing to have done".
Mr Jackson is also quoted in the Sunday Telegraph, saying: "If Downing Street is selling out Gibraltar now before the deal goes through the Commons, then what will she surrender after it's approved?"
In the same paper, Martin Howe - a leading barrister who chairs the pro-Brexit group Lawyers for Britain - writes of Mrs May that "when it comes to caving in to EU demands, she is as flexible as a limp lettuce".
He accuses her of directing her "famous obstinacy" entirely "against those who oppose the series of capitulations she has made to the EU, many of which breach the promises she has previously made".
According to the Sunday Times, divisions over Brexit have even extended to a upcoming Channel 4 film recreating the referendum campaign.
With "ugly tales of creative differences" on the set of The Uncivil War, the paper says its star, Benedict Cumberbatch, asked for script rewrites to depict his character - the Vote Leave campaign director Dominic Cummings - as less likeable.
The drama is due to air early next year, at a time when the paper predicts "a significant proportion of the British public may well have concluded they never want to hear the word 'Brexit' again".
The Times' main story is on its own investigation which highlights a block of serviced apartments in one of London's wealthiest areas which it says is "rife with prostitution".
More than 100 prostitutes and escorts are said to be listed at the property in Chelsea, which is owned by the multimillionaire Christopher Moran. The paper adds that there is no suggestion that Mr Moran has any involvement.
His lawyers state that his company takes a "zero tolerance approach" to prostitution in the building - and insist that he has little or no involvement in its day-to-day running.
Meanwhile, the Sunday Mirror and Sunday People both carry an investigation into a rise in violence towards ambulance crews.
Around eight serious attacks are said to take place every day - including stabbings and sexual assaults - and more than 1,400 homes in England have been marked as "no-go" areas without police back-up.
One paramedic calls for his colleagues to be fitted with body cameras and stab vests.
Meghan and Harry
Meanwhile, the Sun on Sunday reports that the pregnant Duchess of Sussex has pulled out of a visit to Zambia because of concerns about the Zika virus.
Prince Harry will arrive today to carry out the two-day tour alone.
The Star on Sunday claims bookmakers have received a number of "big money wagers" that Meghan will give birth to twins - and have stopped taking bets.
The Sunday Mirror and Sunday People are told that the couple's new home in Windsor will include a wing for her mother Doria to stay in during extended visits from her home in Los Angeles, so she can be a "hands-on" grandmother.
And the Sunday Express claims Prince Harry has warned his actress wife to "play down her skills" while spending Christmas with the Royal Family - to avoid beating the Queen at charades. An aide advises that she should "resist that American urge to win at everything".
Social media etiquette
"Tweet others as you would have them tweet you" is the mantra which the Sunday Telegraph suggests children as young as 10 are being taught in new, updated rules for polite behaviour.
The British School of Etiquette is addressing the "rise in online verbal abuse and bullying" by creating classes for social media users in how to "portray their best self, when to avoid slang and how to communicate with kindness, courtesy and integrity".
According to the paper, the module is proving popular because it is teaching children to consider other people's feelings.