The band acknowledged they’ll feel “emotional” on Saturday night.
“There will be a few tears at Wembley for the journey we’ve been on,” said Yerrell.
“I think there’s a bit of validation being in London, especially when you go back to right at the beginning when we first started and people doubted us.”
Holland added: “It’s like going to a cup final that you’ve already won.”
Next year the band intend to self-release their fourth album, with Yerrell stating they have no intention of changing their DIY approach.
“It’s just the creative control we love – we don’t have to get approval from anyone,” he said.
“It’s about having 100% ownership so if it goes wrong it’s our fault, if it goes right it’s our success.”