Over the past four weeks, 12 couples with widely different parenting styles have competed to prove their way is the best. Now the winning four return to face the ultimate challenge - looking after each other's children overnight and away from home - before returning to the studio to discuss how it went. It's then up to the studio audience to choose which they believe to be the best parenting style - and who deserves to be crowned Britain's Best Parent. Presented by Anita Rani.