In an ITV schedule shake up, Ant and Dec's Saturday Night Takeaway will be off air tonight.The hit variety show, which normally goes on at 7pm, won't air on Saturday 19 March as usual as a sporting event takes its place. So, why isn't it on? Well it's all eyes on the Six Nations currently with not one but two rugby matches taking place on Saturday 19. Ireland will be playing Scotland at 4pm in the first match of the day, before England play France at 7:15pm.