TV Guide ITV Tuesday

The celebrity team come to the end of their fast-track training to dive with 18-foot tiger sharks and relocate to the world-famous dive site of Tiger Beach - after getting one last chance to hone their skills and demonstrate that they are ready to take part, the qualified team members come face to face with the iconic shark. Will the celebrities have their perceptions changed in a life-changing encounter, are they still monsters to be scared of, or is their biggest fear an ocean without sharks?

Jason Williams visits a community allotment in Liverpool and Martha Swales shares a seed sowing masterclass. Camilla Bassett-Smith explores a pristine Yorkshire garden and Henry Agg provides a step-by-step guide to building a raised bed. Alan shares his expert advice on growing potatoes and managing ferns

Ed Chamberlin presents coverage of day one of the prestigious festival, where the feature race is the 4.00 Unibet Champion Hurdle, and races also take place at 1.20, 2.00, 2.40, 3.20 and 4.40. Analysis comes from AP McCoy, Ruby Walsh, Mick Fitzgerald and Megan Nicholls, with reports by Matt Chapman, Alice Plunkett, Rishi Persad and Luke Harvey, Social Stable updates from Oli Bell, betting news with Brian Gleeson, and commentary from Richard Hoiles

Bradley Walsh hosts as Steven from Stirling, Phia from Amersham, Jack from Birmingham and Helen from Loughborough work as a team to take on one of the experts in the hope of winning a potential prize pot worth thousands of pounds. They work as a team and play strategically to answer general knowledge questions against the clock and race down the game board to the exit without being caught

The broadcaster travels to Northern Ireland to explore the culinary scene in Belfast, a city blessed with a bounty of food and drink. Dermot also meets chef and restaurateur Gemma Austin and finds out about Fifteens, an iconic snack in the city