with me arejoe twyman, who is the director of the polling organisation deltapoll, and the author and journalist yasmin alibhai—brown. many of tomorrow's front pages are already in. let's start with the observer, which reports that the threat of a tory rebellion could mean a delay in the rollout of the government's flagship welfare reform, universal credit, as work and pensions secretary amber rudd seeks approval for a pilot scheme to be rolled out instead. brexit leads the independent. the paper says theresa may's hopes of securing legally binding changes needed to win support of her deal are fading, as diplomats in brussels say it is unlikely the eu will hold a summit to sign off any changes. the mail on sunday leads on the story of an ex—wife forced to pay out £250,000 to her former husband after she apparently tricked him into thinking he was the biological father of their three children. the cost of obesity is the lead for the sunday times, with a 575% increase in operations for knee and hip replacements costing the nhs an estimated £200 million a year. the sunday telegraph warns