The single's challenging for a top 20 spot on Sunday – how are you feeling?
"Really pleased. That's a huge achievement and we feel we've come a long way in a short space of time. It's only four months since we were on NME's 'Radar Tour', so to have a top 20 hit would be madness really. It's been a really important song for us because it's taken us all over the world. We wrote it as a means of escape - and that's exactly what it's done for us!"
Is the song written from personal experience?
"It was more an idea - Adam and I are both quite visual writers. It's a story but it's also about us wanting to be saved, because until recently we both had a pretty terrible life being on the dole."
Why did you decide to remake the music video?
"The new video's a tribute to the first one. It's very anti-Ibiza. We had 20 quid to make the first one and we were stuck in a sh*tty room with a girl we didn't know. Our vision was always to make the video that we have now. We wanted the girl from the original to appear in the new one actually, and we spent six months trying to find her, but we didn't manage to track her down. At the time we just posted an advert in a shop window and she was the only person who came! It's unbelievable that the original clip now has something like three million YouTube hits."
Your previous single, 'Better In Love', charted at number 50. Were you disappointed?
"Not in any way! We thought it was incredible - it was other people who seemed to think we should be disappointed. We only played our first ever gig two months before the song came out, so to get to number 50 was a huge achievement for us. It brought people's attention to us, which was the purpose of it really. You could say, 'It's not about the battle, it's about the war'."
You're already successful in Europe. Why do you think we're taking longer to catch on?
"I don't think you can ever plan how something like this will turn out. It all depends on time, people and place. Greece has been wonderful to us so far. They were having a terrible time financially earlier this year, so it's great to see a song about having a wonderful life connecting with them. Britain's obviously the place we hold dear as it taught us how to write songs, but a band like us at the moment is competing with heavy-hitters like Taio Cruz and Jason Derulo. It's been our dream to do that, but we're coming up from the bottom and hopefully providing an alternative."
It's something that pop music sorely needs.
"Pop music thrives on it. Back in the day you had your Oasises and your Spice Girls, your Depeche Modes and your Nik Kershaws. It's a difficult path offering something different, but you have to just keep going at it."
What do you think about the current state of the charts then?
"It's a difficult one. British pop music seems to go in waves - it thrives on individuality but at the moment a lot of artists sound the same. People like David Bowie were completely different but managed to stand alongside other big acts, whereas today that idea seems to be lost. There's a lot of piggy-backing going on. I think it's about to change though - the public aren't stupid."
We hear you bagged Kylie for your album by writing her a love letter. What did you say?
"You say love letter, but I could only dream of actually hand-writing a letter and the postman getting it into the right hands! Adam and I were keen to have someone like Kylie on the album, because her voice sounds so strong over a sad song. Eventually we just thought we'd ask the actual Kylie, because the worst she could do was say no. Fortunately she loved the track and agreed to do it, but at the same time the album had already been sent out to the press, so we were desperately trying to get the copies back!"
Are you a fan of her new album?
"I've only listened to bit and bobs so far. There are some amazing tracks on there and she sounds very comfortable. She's graceful, she's got such integrity and she knows what kind of artist she is. She develops all the time but still within her niche. I'm in love with the song 'Better Than Today'."
Does 'Wonderful Life' represent your album well?
"It represents a certain part of the record well. It covers a certain period of time. That song, 'Better In Love', 'Unspoken' and 'Evelyn' were all written when we were very unhappy, but there's a whole other side to the record - songs like 'Stay' and 'Illuminate' - written when things were better and we were travelling the world. That said, I suppose 'Wonderful Life' represents the overall message of attaining happiness."
What's your favourite track on the album?
"I think a lot of people will be interested to hear 'Evelyn'. It's one of the first tracks we wrote and it's got a lot of guitars on it, so it has a slightly different mood to the rest of the record. There's also a song called 'The Water' which has no synths at all - it's all real instruments."
You're also known for your smart image - have you always been so dapper?
"It started with this £5 Oxfam suit that I can't part ways with, because I'm silly and sentimental, but it also comes from a time when we were on the dole for three years and 'chasing the dream' of becoming popstars. Going down the job centre every Wednesday and saying 'Hello, I'm a loser' was hard, but it felt easier if you looked respectable. I was getting a Mega Bus from Manchester to London every other week to meet record labels, and wearing a suit and having my hair done made me feel like I could do it. Having been in that situation means neither of us are taking this chance for granted, because we know we could just as easily be back there."
'Wonderful Life' is out now. The album Happiness follows on September 6.