He shared: "It suddenly struck me today that actually what we're doing right now is going to make this bigger, because we can do five concerts in one concert at a time it's going to be the most amazing thing ever! So I think everyone who's not enjoying the One Direction break at the moment, just know that this is like a super important time for us to be able to give you the best show ever. This is like the warm up stage - that's what it feels like to me anyway."
Meanwhile, Niall Horan is quite keen on a reunion too as he confessed he is already starting to miss parts of being with the 'What Makes You Beautiful' hitmakers.
He said: "Every now and then you're like, 'Fookin' hell, where is everyone?' You're sitting in an airport lounge, they call you for a plane, and you don't stand up initially because you're waiting on everyone else, you know? 'Oh, Louis'll be back from the toilet in a minute.'"