Pronto Mama @ The Art School, Glasgow, 26 May

It’s the hottest day of the year, and the heat threatens to stifle the energy inside a packed Art School. Indeed it might have, if this wasn’t such a highly hyped gig. Debut album Any Joy is enjoying rave reviews and propelling the band on an upward trajectory that could see them mentioned alongside the other gems of Electric Honey’s prestigious discography. Tonight gives the sense that this band have already established a solid cult following, and could be on the brink of a major breakout.

There’s a genuine excitement in the crowd for tonight, and it says a lot that this young band, weeks after the release of their debut and still signed to such a small label, can fill a space as large as The Art School. And fill it they do with a diverse and expansive sound drawing on just about every musical touchstone from the Scottish indie world this century. There’s a hint of Biffy Clyro in the heavy breakdowns, Frightened Rabbit in the densely packed colloquial lyricism, Admiral Fallow in the folky melodies of their gentler songs, and Franz Ferdinand in the sheer joy of their choruses.

It’s the diversity of Pronto Mama’s sound that makes them the most exciting and promising band to come out of Glasgow in the last couple of years. Gentle folky openings build into euphoric pop choruses which give way to powerful math rock breakdowns joined by flailing horn accompaniments. Breakout single Arabesque could just be brewing into a genuine hit: the crowd here already know every word and the huge drum, guitar and trumpet chorus has the feel of a festival sensation in waiting.

Coming back on stage in the sweltering heat, the a cappella Sentiment is given an added power by the memory of a minute's silence earlier in the gig – 'all of this evil, it’s always been here, I know we should know better now give us a break'. The crowd already know every word, they already know this song and they already love this band. Pronto Mama might go on to big things, and they might just be indie’s Next Big Thing – but even if they aren’t, they’re already cult favourites, and they might just be here for the long haul.