The Laughter Effect - Diarmuid Gavin

Paul McKenna is a British hypnotist, behavioural scientist, television and radio broadcaster and author.He started working in Radio aged 16, and went on to present for stations including Radio Caroline and Capital London.After two years presenting at BBC Radio 1 in the early 1990s, McKenna hosted a number of TV programmes, including The Hypnotic World of Paul McKenna (1993–97), The Paranormal World of Paul McKenna (1996–97) and Hyp the Streets (1999).

Ruth ‘Husko’ Huskisson is a working-class comedy writer and performer from the Black Country. A recent alumni of the BBC Radio Comedy Writers’ Bursary, she has contributed across a wide range of BBC audio comedy projects.Her writing credits include flagship Radio 4 and BBC Sounds shows such as The News Quiz and Just A Minute, as well as Wing It, Live From The UK, Evil Animals and Evil Genius. She’s also written for Channel 4’s Late Night Lycett (Series 1 & 2), Currently, she’s developing her own sitcoms in a bid to become the Poundland Phoebe Waller-Bridge.

John Thomson is an English comedian, narrator and actor best known for his roles in The Fast Show, Men Behaving Badly, Cold Feet, 24 Hour Party People, Grimsby and Coronation Street.

Reece Shearsmith is a British actor, comedian and writer, best known for co-creating The League of Gentlemen, with Steve Pemberton, Mark Gatiss and Jeremy Dyson. Jointly with Pemberton, he created, wrote and starred in the sitcom Psychoville and the dark comedy anthology series Inside No. 9.

Johnny Ball is an English television personality, children's television presenter, writer and populariser of mathematics. He regularly appeared on British television for several decades, predominantly on the BBC, featuring in or presenting programmes such as Play School, Think of a Number, Think Again, Think It ... Do It, Think...This Way and Johnny Ball Reveals All. He has also published a number of non-fiction books.

Tim Lovejoy is an English television presenter best known for hosting Saturday morning football programme Soccer AM with Helen Chamberlain for over a decade and BT Sports Panel  on Saturday mornings. He currently presents Sunday Brunch on Channel 4.

Chizzy Akudolu is an award-winning British actress, writer, and producer who is best known for her role as Mo Effanga in the BBC medical drama Holby City. She has built a diverse two-decade career spanning television drama, children's comedy, reality TV, and voiceover work.

Diarmuid Gavin is an Irish garden designer and television personality. He has presented gardens at the Chelsea Flower Show on nine occasions between 1995 to 2016, winning a number of medals, including Gold in 2011. He has also authored or co-authored more than ten gardening-related books.

Sanjeev Kohli is a Scottish actor, comedian, and writer. He is best known for his role as shopkeeper Navid Harrid in the BBC sitcom Still Game, Ramesh Majhu in the radio sitcom Fags, Mags and Bags, and AJ Jandhu in the BBC drama series River City.

Jeremy Vine is a television and radio presenter and journalist, best known as the host of his BBC Radio 2 lunchtime programme.He also hosts his own weekday current-affairs show on Channel 5.