| Last updated
Claflin's Mosley escaped a botched assassination attempt at the end of series five, leaving rival Shelby (Cillian Murphy) on the verge of madness. He told LADbible the show hasn't started shooting yet as Covid restrictions continue to slow down the TV and film industry - but he's itching to get back to it.
He said: "I can't talk about my specific storylines, but I have seen scripts and they're very, very, very juicy. I know they're keen to get up and running as soon as it's safe. It's something I'm very keen to get back to.
"There's nothing concrete in the diary yet, but I'm chomping at the bit to get back to it because of where we left it and where I know it's going."
Mosley was a new type of nemesis for Shelby, as the former right wing leader manipulated his politically inexperienced foe. So where is it heading in series six?
"It all depends on Shelby really," says Claflin. "In series five, he went from being a big fish in a small pond to being in the ocean. Seeing how little power he actually has in amongst the real power, against someone like Mosley, who was born into that world. Shelby was out of his league and it was really exciting to watch, so you can expect there to be more of the same."
Claflin - who stars in new Netflix film Enola Holmes with Millie Bobby Brown and Henry Cavill - said he wanted to see where Mosley would go, safe in the knowledge he wouldn't get bumped off in one series.
He said: "The best thing about getting involved as Mosley is that we know the history of him - so I knew that I'd survive! He lived a long life, so I felt protected.
"He's a very rich character with a lot to play with. I'd never heard of him before the job but after doing a bit or researching about who this man was, it was eye-opening.
"So knowing what's to come in his real-life journey - it's exciting to know he's still in the Peaky Blinders world."
Meanwhile, Enola Holmes hits Netflix on 23 September, and Claflin - who plays eldest Holmes sibling Mycroft - says he was delighted to be on set with sci-fi royalty, sharing screen time with The Witcher's Geralt/Superman and Stranger Things' Eleven.
"I did feel slightly inferior, I'm not going to lie," he said. "There were no magic powers coming from my side. Someone said, 'but you were Finnick [in The Hunger Games]!' But Finnick died! He got his head ripped off by lizards. It's not a patch on those two.
"With Henry, I was mostly getting nutrition tips so I can look like him. Although I do love my beer too much to get in that sort of shape.
"It's a classic tale told in a way that feels really relevant. I loved the breaking the fourth wall element of it, it has a really fresh feel to it. Mycroft is the de facto Dad of the family really. Quite strict, trying to keep them in line.
"He doesn't like change. But I understand the competitive nature of siblings. I have younger and older brothers, me and Henry are both from big families, and you have those rivalries.
"Me and my brothers are all different but we're competitive. One invited me to a park run. I'd done no training, and he'd been training for two years. I just couldn't bring myself to lose to him though. I spent the whole last lap vomiting into my own mouth."
Enola Holmes is based on the books by Nancy Springer - and with six of those to go at, Claflin says he'd be up for a second installment.
"It's not in my hands, but I'd definitely be open to another one," he said. "I had a of of fun doing it. There's material there - and I'm always wanting more work, so my door is always open."
Chosen for YouChosen for You
Most Read StoriesMost Read