He's a bit reluctant to talk a lot about the show but will reveal he talks about China and about his religious beliefs.
Sean Lock is driving to a gig as we speak on the phone but he's not in a purple van.
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you don't get any repeat fees.
"I realised I didn't need to do it any more. It will still be shown for years anyway and Air Max Patch Sand
The comedian, a familiar face from Air Max White Orange his appearances on TV shows QI, 8 Out of 10 Cats and Mock the Week, has called his latest tour Purple Van Man.
The line up boasts a host of well known TV faces, including Alexander Armstrong, Alistair McGowan, Dave Spikey, Josh Widdicombe, Russell Brand and Kane and Lucy Porter. There's also a lot of up and coming talent on show.
Chance to have a good laugh at comedy festival
He said: "I just thought it was an absurd idea that anyone who does a manual job and drives a white van has exactly the same thoughts. I've always thought that's daft and slightly insulting.
"The dog eat dog version of evolution is not much to do with Charles Darwin. You're given a historic idea of human nature.
"I'm basically arguing that cooperation drives evolution as much as, or more than, competition.
"I worked out there could be kids in Indonesia on a better hourly rate than me."
He said he took a long time to work out what he wanted to do and that meant working as a builder's labourer, a short lived stint in a DHSS office and the worst job of all, working in a psychiatric hospital.
"I look at the way that animals help each other, like how baboon packs are organised. Darwin called altruism the single greatest riddle.
Here we catch up with just a few of the famous faces appearing over the coming week.
Not many comedians would be able to entertain an audience talking about evolutionary theory for an evening but Rob Newman is passionate about the subject.
This year is the ninth festival that Toby Foster and his team have put on and there are more than 90 shows across the city this month. Many of the big names are appearing at Sheffield City Hall.
The Last Laugh Comedy Festival just kicking off in Sheffield this weekend is offering practically an A to Z of British comedy favourites, from Adam Hills to Wit Tank.
"They'd assume I drove a purple van." Actually, it's a silver VW van.
"It's got big benefits for me. I've calmed down a lot."
By the way, he has now got fed up of QI. "It's repeated endlessly and sold all over the world. You do one recording and it's probably sold 300 to 400 times each episode.
On top of that there's a live version of The Hitchhiker's Guide to the Galaxy and kids' comedy festival for the first time.
Apparently Sean is absolutely in earnest about how his new found spiritual side has helped him in life but as a comedian he can't resist joking about it. "Some days I wear a veil, other days I don't eat pork.
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Man is at Sheffield City Hall on October 11 and 31.
thought 'that looks nice' and tried to take food out.
Sean got started as a stand up by doing a few pub gigs, then realised he could make a living out of comedy.
He says he talks about it in the second half of his show.
"I worked as a kitchen porter. I used to have to scare the patients away from the bins when they Air Max 95 Rainbow
"You really have to have a word with yourself and think where am I going when part of my job is clapping to scare away people with mental health issues."
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