Definition: Generate an appropriate title for the given text. The generated title must be short and include the main topic of the text. The preferred titles are under fifteen words.
Input: By BBC NewsStaff The Sun on Sunday says it was a "caustic" call in which the prime minister said the EU's "unrealistic demands" had reached their limits. "Boris won't budge" says the Sunday Express, which is among the papers with the headline, "Final Throw of the Dice". A government source tells the Sunday Times the chances of an agreement are no better than 50/50 - and that Mr Johnson could announce no-deal in a televised address to the nation. The paper says he'll blame the EU - in particular the French. The paper has spoken to thirteen cabinet ministers who say they would back Boris Johnson if he concludes no-deal is necessary. One - who voted Remain - says, "we can't be seen to sell out on sovereignty issues". The Observer reports that millions of doses of the Pfizer Biontech vaccine could be flown to the UK from Belgium on military aircraft - to avoid delays at ports caused by Brexit. The paper says ministers are not prepared to allow the vaccine to the held up, whether or not a deal with the EU can be agreed. Queen to get Covid jab 'within weeks' The Queen and the Duke of Edinburgh will be vaccinated against Covid-19 "within weeks", according to the Mail on Sunday. Senior sources tell the paper they won't get preferential treatment, but rather "wait in line" to be vaccinated as part of the first wave of people aged over 80. The paper says their example could help to combat misinformation about the jab. The Sunday Times remembers that in 1957, the Queen let it be known that Prince Charles and Princess Anne had been immunised against polio, helping to ease public concern about the vaccine. In a similar vein, the front page of the Sunday Mirror features 15 celebrities, all of whom say they're ready to "give the jab a stab". Among them, the former Today programme presenter John Humphries, who says "you'd have to be completely insane not to take it". The Sunday Times reports that Roald Dahl's family has "discreetly apologised" for his anti-Semitism, with a statement on an obscure section of the writer's website. The paper says he was a self-professed anti-Semite and had made comments sympathising with Adolf Hitler's animosity towards Jewish people. The apology was published by his family, explains the Sunday Times, because of concerns that Roald Dahl's racism could tarnish his legacy and brand. Iceberg threat to seals and penguins The Mail on Sunday sounds the alarm about a trillion-tonne iceberg that's drifting towards the British Overseas Territory of South Georgia, in the south Atlantic. If the berg runs aground it would be devastating for the island's penguin and seal population, the paper says, blocking off feeding grounds and causing major environmental damage. It's said to be moving at less than one mile per hour - and breaking up as it enters warmer waters. Sign up for a morning briefing direct to your inbox

Newspaper headlines: 'Cabinet backs PM over no-deal Brexit'