The documentary will debut at the Lyceum Theatre in Sheffield on 13 June, followed by a Q&A with Brown and the band members.
Bassist Stainburn, who cites his musical influences as 80s rock such as T-Rex, says he’s “nervous” about the occasion.
His favourite part of being in the band is “people enjoying the music, joining in with it and dancing with it”, he adds.
After the fanfare is over, Ultimate Thunder will be back to the studio – a new album may be in the works for later this year.
Although the documentary is finished, Brown says he’ll “be a fan forever”.
“The guys are probably sick of me going to rehearsals, but they won’t get rid of me that easily,” he jokes.
Deemed the “most punk rock band in Britain” by Big Issue in 2022, external, does the band still proudly claim that title?
“It depends on what you mean by punk rock,” Mabbett muses.
“I think from a DIY ethic, which is kind of what punk was then that’s fair. Punk as an attitude, rather than a genre.”
“No one is playing the part or trying to be punk – the guys just want to play music,” Brown adds.
“I guess there’s nothing more punk than that.”