Image caption The Times reports that Theresa May will be facing a "Brexit showdown" this week, as pro-Leavers in her cabinet call on her to ditch her favoured customs deal with the EU. The paper says Mrs May's so-called customs partnership in "unworkable" and would encourage Brussels to press for the UK to stay in the customs union.

Image caption The i leads with an exclusive survey that claims the majority of the UK public want to stay in the single market after leaving the EU. The paper says the survey of 220,000 people revealed a second referendum would see the country "split down the middle", as 88% would vote the same way as in 2016. But it also showed that only 18% of people were happy with the Brexit negotiations so far.

Image caption The founder of MoneySavingExpert is suing Facebook for allegedly profiting from online scams that fraudulently used his image, reports the Metro. Martin Lewis will launch the landmark legal action in the High Court on Monday, claiming more than 50 fake ads featuring him have appeared on the social network in the past year alone.

Image caption The Guardian claims the government knew of the risk to the Windrush generation with its "hostile environment" immigration policies almost two years ago. The paper says it has seen a letter from a Home Office minister, dated May 2016, regarding the cases of Trevor and Desmond Johnson - Trevor has faced threats of deportation while Desmond has not been allowed back in the country since going to Jamaica for his father's funeral in 2001.

Image caption The Daily Mail claims electronic gadgets that can be used to steal cars are being sold for as little as £100 on Amazon and eBay. The hacking devices are said to allow thieves to re-programme a blank key fob so it can start a car's ignition.

Image caption Knives are being sold to children as young as 14 despite a nationwide ban, according to a special investigation by the Daily Express. The paper says that more than a quarter of shops it visited were ready to sell blades to youngsters, even though the law dictates that buyers must be 18 or older.

Image caption Doctors are calling for a ban on fast food outlets opening within 400 metres of UK schools, says the Daily Telegraph. The Royal College of Paediatricians and Child Health told the paper it is calling for the measure to help tackle the obesity epidemic in the country.

Image caption "The Great British Bake Is Off", says the Daily Star, as the paper predicts temperatures will plummet. It says the heatwave is over after Sunday's hottest London marathon on record, with some parts of the country expected to plunge to -5C by next weekend.

Image caption The Daily Mirror has an interview with a man claiming his 82-year-old mother has been "rescued from the ravages of Alzheimer's" because of a diet high in blueberries and walnuts. The paper says Sylvia Hatzer had been unable to recognise her 50-year-old son Mark, but her memory has gradually returned.

Image caption The Sun reports that inmates at HMP High Down have performed a version of the musical Les Miserables to the public. The paper says the prisoners rehearsed for more than a month with an opera company before the performance - which saw tickets go for £70.

Image caption The EU is planning to shift billions of Euros in funding away from central and eastern Europe to the southern states, according to the Financial Times. The paper says Brussels wants to end the practice of distributing money to countries based on their gross domestic product, and replace it with much broader criteria - including youth unemployment, education and the environment.

Newspaper headlines: 'Brexit showdown' and Facebook scams