In a recent interview with Digital Spy, Ed said that the 1D guys playing huge stadiums is pretty impressive, noting: "I think it's great for them to be at stadium level. I think it's fantastic the success they're having and really flying the British and Irish flag everywhere around the world. It was a very good thing."
As for the song "18" that Ed wrote for One Direction's newest album, he recently told Capital FM, "I'm really happy with the record that I wrote for them. It's the first record I've actually specifically written for them."
He added, "The other ones were my records that just didn't make it only my album, just because I had too many slow songs. But this one, I remember I had a meeting with them and he said we need a song. And the day after I wrote it and sent it over, and they sound great on it! It's good."