They are tipped as one of music’s next big things – but don’t expect electro band Nimmo to go for pop polish.

The group have already released a string of thumping dancefloor fillers, powered along by the twin vocal of Sarah Nimmo and Reva Gauntlett, while they’ve supported the likes of Years & Years in the past.

It has led to a hefty amount of hype building behind them, marking the band out as future chart stars, with an album due to land early next year.

“We definitely don’t want anything too polished,” argues Sarah, ahead of Nimmo playing the Rum Shack on Sunday night.

“It’s difficult making pop music and avoiding that, because you want to be on the radio and you want people listening to it in mass numbers, but at the same time we’re not polished people and it’s so important that the record sounded like the live experience, and that there’s a rawness and energy.

“We wanted the album to feel as gritty as we can.”

Sarah met Reva when they started secondary school, and they’ve been inseparable pals ever since. After mucking about with bands at school, things started to get more serious when they went to university, where they both studied English.

That’s when they met the rest of the group and found their own identity, writing massively danceable pop songs that tend to be accompanied by dark lyrics. Earlier this year they released UnYoung, about a parent dying, while recent single Dancing Makes Us Brave captures trying to get over heartbreak on a night out.

“Often a lot of the songs we’ve written about darker experiences tend to become celebratory by the time we’ve finished the instrumentation,” explains Sarah.

“UnYoung started out being morbid and thinking about your parents dying, but at some point it became like a celebration of life, and something that was really cathartic. Obviously everyone goes through losing relatives and friends, and it becomes more common as you get older, but this became a really powerful track in a celebratory way, not a broken way.

“Sometimes being around friends and dancing can be what gets you through these things, and although we write darker lyrics the instrumentation can be what gets us through the subject matter we’re writing about.”

Originally this interview was scheduled with Reva, only for her to be floored with a sore throat, meaning Sarah stepped in, with Reva chipping in with the odd answer. The duo are freshly back from a trip to Berlin, and before that they were out on the road with Norwegian songstress MO. That was the latest top support slot that Nimmo have netted, including getting to play some arenas last year.

“Years and Years was the biggest, because there were some huge venues,” says Reva.

“We played Wembley Arena and got to shout ‘hello Wembley when we went onstage! Being a band from north London that felt like a ridiculous experience, just totally surreal. Then we did MO last month and that was amazing, because we got on so well and the fans seemed to be so responsive to us.”

Now they’ll headline the Rum Shack on Sunday. It’s a gig being put on by Glasgow’s female collective TYCI, who are involved in a host of creative products, from blogs and webzines to podcasts and club nights. Their DIY spirit is something that Nimmo’s frontwomen appreciate.

“We actually did a show with them in Edinburgh earlier this year and it was amazing, they were just the right kind of promoters to work with,” adds Sarah.

“They’ve got a feminist mentality behind them, and it’s always good to see like-minded and forward thinking groups – some of the other people playing on the night were incredible. That DIY attitude is great, especially when it’s setting up gigs or letting you meet other people.”

Nimmo, the Rum Shack, Sunday, £7.50, 7pm