What the papers say - January 29

Growing challenges for Theresa May and her leadership over Brexit are at the top of the agenda for a series of papers on Monday.

Several also carry images of an emotional Roger Federer, after the Swiss player became the first man in tennis history to win 20 grand slam finals with victory at the Australian Open.

The Daily Telegraph says it has seen a message sent by energy minister Claire Perry in which she described some hard-line Brexiteers as "swivel-eyed" - a sign of divisions over Brexit at the highest levels of the Tory party, according to the paper.

Brexiteers are coordinating to discredit Chancellor Philip Hammond, The Times reports, alongside a lead story on calls for ministers to increase pressure on social media firms to tackle child abuse.

The Metro reports that Mrs May's leadership is under increasing threat after she was accused of governing like a "tortoise" by a former frontbencher.

The Sun also carries the warning for Mrs May on its front page, alongside a lead story on a new service that allows holidaymakers to reserve their sunbeds before leaving home.

The Daily Express says Mrs May has been put on notice by senior party members that she faces the sack if she backslides on Brexit.

Meanwhile a looming row between London and Brussels over what influence the UK retains over EU laws agreed by the bloc after Brexit day threatens to delay a deal over the transition period, the Financial Times reports.

Some 133 babies died while sleeping in their parents' beds in a year, the Daily Mirror reports, leading to a warning that mothers and fathers should never take the risk.

The Guardian says an estimated 338,000 properties rented by young adults are deemed hazardous and pose a risk to health.

Meanwhile the number of young carers looking after relatives has surged in recent years, with 50% rise in under-17s looking after disabled adults, the Independent reports.

The Daily Mail reports on a study that has found two thirds of teenagers feel they are being bombarded by betting firms on television.

The i reports that knives have been seized from children as young as four amid a 42% rise in the number of pupils being caught with the weapons.