All Together Now, BBC1, 7.20pm

ROB Beckett hosts another edition of the musical talent show, as a range of singers step on stage for a chance to win a £50,000 cash prize. The key to success is encouraging The 100, a panel of music experts, to sing along too, and the more each performer manages to win over, the better their chances of proceeding to the grand final. This week’s contestants include a medical student, a personnel manager, a West End performer and firefighting brothers, performing tracks by Radiohead, Stevie Wonder, Christina Aguilera, Queen, OutKast and Paloma Faith.

Mission Ignition, Channel 4, 8.30pm

TAKE That member Howard Donald (pictured, right) loves classic cars. In fact, before becoming a heartthrob during the band’s first stab at fame, he earned a living as a panel beater and vehicle sprayer, giving him the opportunity to get up close to some incredible vehicles. Since then he’s turned his hand to racing, competing at Le Mans and Silverstone. Scot Dario Franchitti, meanwhile, is a bona fide superstar of the track, having won the IndyCar series four times, the Indianapolis 500 three times and the Daytona 24-hour race. The duo come together for this new series in which they challenge teams of amateur car enthusiasts to rebuild a classic motor and, if they’re successful, they get to drive away in it.

The Royal Family at War, Channel 5, 9pm

ARE the Royal Family just like the rest of us? It certainly seems as if they have as many feuds and fallings-out as ordinary folk if this two-part programme is anything to go by. It uses rarely seen archive footage and interviews with royal experts to examine rumours of rifts and tiffs allegedly caused by scandalous love affairs, arguments and bitter disputes. In the concluding part, royal biographer Penny Junor sheds light on the rumoured conflict between the Queen and the Duchess of Cornwall, stating that, “if the Queen could have opened up a large hole and put Camilla into it, it would have been perfect as far as she was concerned”. Also discussed are Princess Margaret’s desire to marry divorcee Peter Townsend and Sarah Ferguson’s rumoured clash with Prince Philip.

The Jonathan Ross Show, STV, 9.45pm

THE host is joined by Westlife, who announced the news of their return to music in October to a frenzy of media coverage and social media activity. They will be on the road in May with their Twenty Tour celebrating their hits. Also dropping into the studio are Love Island winner Dani Dyer, pictured, right, who recently completed the Kilimanjaro challenge for Comic Relief, and London-based American comedian Desiree Burch. Plus, there’s a chat with Line of Duty stars Vicky McClure and Adrian Dunbar, who can be seen in the fifth series of the crime drama tomorrow night on BBC1.