"I've given up on processing things." That's vocalist and guitarist Finn Keogh's response when asked how playing the main stage of Reading Festival was, at a time when his band Keo haven't even released their debut album. "Can you put that as the main quote, actually?" he adds with a laugh. "It just sums up my entire life right now".

It's unsurprising, given that it feels like everything's going a million miles an hour for Finn. For starters, he and Keo guitarist Jimmy Lanwern are sitting opposite us in their fully-fledged tour bus, complete with a fruit bowl which contains twelve (12!) bananas. They've also just come from performing on the main stage at a festival that is every teenager's dream to play at. It'd be heady stuff even if it hadn't happened at absolutely breakneck speed.

Just over a year ago, this was a band who were gearing up to release their debut EP. Since then, they've sold out venues across the country, signed to a major label, announced a Brixton Academy headline show and supported Wolf Alice at Finsbury Park. We're exhausted just thinking about it.

"It's so weird that we're thinking about Brixton when we haven't even played our show at Kentish Town Forum yet," Finn says. "It's like Forum's an afterthought, but it's been a dream of ours for years. We saw Pixies there; I saw Wunderhorse there. I originally saw Wunderhorse at a tiny venue, and watching them play the Forum was the moment when it felt like they went from being my band to everybody's band, so it's a venue with so much meaning to us."