Sadie Frost is a busy woman.

Not content with just running production company, Blonde to Black, with her partner Emma Comley, she also has her own fashion line, Frost French, on top of regular acting stints on stage and screen.

“All of these jobs are self-obsessed,” acknowledges Frost. “That’s why with those three things, I put a lot back, and do a lot of charity work.

“If I just did all me, me, me projects, it wouldn’t be very healthy. I have to be reminded to give other opportunities to people who don’t have opportunities.”

Now aged 50, Frost says her days as a former Primrose Hill set party girl are firmly behind her, swapping late night raves for film festival dos and family life at her Belsize Park home with her children from former marriages to Spandau Ballet bassist Gary Kemp and actor Jude Law. It’s a challenging balancing act, she admits.

“The children and I all see each other for breakfast before we go off for school or work, and then we see each other at tea time.

“If I’m filming or on set they come to see me on set, as they can get around themselves now. We just make time,” she adds.

“You just make sure you don’t go out to too many events. Not that I go out socially so much, but you have to go out to film festivals.

“I’ll gravitate to commit to those type of things rather than social things – otherwise, I’ll just stay in with the kids.”

It’s a relative period of calm for Frost and Kensal Rise resident Comley before the UK premiere of their latest film, Set the Thames on Fire, which opens the Loco comedy film festival at the BFI on Thursday, April 21. The 12-day festival, now in its fifth year, is set for its biggest programme ever, showcasing some of the newest British and foreign language comedy that the independent scene has to offer at venues including the Barbican and the BFI.

Opener Set the Thames on Fire stars Noel Fielding, comedy actress Sally Phillips, Lily Loveless, of Skins fame, and Frost herself in a dark, comedic tale of two men navigating a nightmarish and dystopian vision of east end London.

It’s the first feature by up-and-coming director Ben Charles Edwards, but not the first time Frost and Comley have worked with him, having produced many of his short films.

The trio are already working on their second feature together.

Acting and producing simultaneously requires all of Frost’s multitasking capabilities, she says.“In Set the Thames on Fire, I was producing the film while dressed up as a 60-year-old woman, with a fat suit and prosthetics.

“I was playing a slaggy landlady, while also trying to walk around making sure that everything was running smoothly,” she laughs.

“It is quite nice because I’m one of those people that gets bored quite easily.

“That’s a bit of problem. But if you do lots of different things, you don’t really get bored.”

With an even busier summer and autumn lined up – preparing for the wider release of Set the Thames on Fire and for a role as the infamous striptease artist Gyspy Rose Lee in new play, Britten in Brooklyn – it’s safe to say that Frost won’t be bored anytime soon.

Loco, the London Comedy Film Festival, runs from April 20 until May 1.