An accidental comedian, Jon performed in serious and comedy plays at university (including an unbelievable version of The Rocky Horror Picture Show in which his performance as Brad was unmissable) and had no real desire to write or perform comedy. It was only after Rob won the So You Think You're Funny Award that the three entertained the idea of continuing professionally. Their first step was to take BAD comedy to the Edinburgh Festival in 1999 which proved such a success that their sequel the following year was a sell-out.

"I feel like I've got a teenage son and a four year old. Have you ever seen Rob's erotic drawings? They're just unbelievable. And Ian does them as well. Rob's aren't quite as graphic as Ian's.

"I was going to be an actor. Other than that I have no idea. No skills. Can't do anything else. I'm kind of glad I do comedy, because acting is just a ridiculous job." But not easily deterred from his chosen path, Jon pursued his dream of acting and as a result has lots of near-miss stories. Having been screen tested for Sky One's Dream Team, Jon was recalled several times for the part and had he got it he would never have taken the life-changing step of going to the Edinburgh festival. If he had got the part, he would never have spoken to Ian again "because if I wasn't going then he would have fallen out with me forever."

A part in Corrie was actually offered to Jon but being involved in a theatre review at the time, he was contractually bound and had to turn the part down. It was a small part which turned into quite a big one. Ashley Peacock, Coronation Streets squeakiest stud. "But he's better than I would have been. It was just one episode, he was just a butcher's assistant, and then they wrote him in to it as his nephew because he did really well. So if I had done it it might have just been one episode, because it was literally only five lines."

Jon performs the role of the "and" in Big and Daft both on and off stage. Very much being the mediator during creative "discussions" and whenever all three are in an interview he says he tends to feel like their mum. "I feel like I've got a teenage son and a four year old. Have you ever seen Rob's erotic drawings? They're just unbelievable. And Ian does them as well. Rob's aren't quite as graphic as Ian's. They're like erotic drawings done by a four year old, whereas Ian's are done by a pubescent 15 year old." He doesn't mind being in that position and for most of the time he enjoys it. Surprisingly, when anyone asks Jon what he does for a living he replies that he is a teacher, which I suppose he is - to two 27 year old children. "When we go out and we do stuff I'm just constantly going "stop it! Stop it!"" He sees himself as Rob and Ian's facilitator, getting funny things out of them. And when big and daft get together its innocent fun. "It's like giving a child a toy to play with and seeing what he does with it."

Before pursuing comedy full-time Jon taught English and Drama in a school for the permanently excluded in Croydon, along the lines of Michelle Pfeifer in "Dangerous Minds". Not being a trained teacher, and the class not really being there to learn, Jon describes the experience more as a lesson in crowd control. An experience which proves invaluable during Big and Daft rehearsals. "When you get the kids on a good day, it is superb, but then it could be awful. You would just know when you came in, there would be nothing that you could do."

Life in the comedy industry for a man who doesn't consider himself to be a comedian has so far treated him well. Far preferring it to the acting business Jon realises they have had their lucky breaks but its impossible to climb the comedy ladder without a real talent. "If you're a good comedian, then you will get discovered, you will get to do what you want to do. But if you're a good actor, it doesn't necessarily mean that you'll make it." And its not without hard work that Jon and his cohorts are in the position they are today. Poised to take an all-star cast to the Edinburgh festival in August, being tipped by some to take the Perrier.

He's never had a real desire for fame, its just that he believes that what he is doing now is the only thing he can do. "It's all about making a living and doing what we want, and we're doing it. The reason I do isn't to be famous, it's because I like doing it."

"Pretend you asked me some questions and I just shook my head...That's my idea. Keeping up the element of mystery."

In the future Jon will be taking on the role of Ray Peacock's nephew (click here), Jason, reverting back to playing a character rather than his part in BAD which is just an extension of himself. "Ray's opinions are a lot more specific to our culture and he tries to set youth to rights. And his nephew is the embodiment of that culture." Jason is the same age as Jon but still lives the life of a 16 year old, "being into scooters and bikes and dressing like the blokes out of Steps". Again he is a character designed to provide feed lines so Ray can demonstrate his opinions which are the lines which will get the laughs. Which may explain why Jon doesn't feel like a comedian. "He's just a victim and Ray makes him more of a victim, he doesn't sympathise with him whatsoever. It won't be a double act thing."

Jon is keen that we build up his air of mystery... "Pretend you asked me some questions and I just shook my head". He's thinking of branching out on his own and doing a one man show, "Jon Williams: Friend of Foe?" The idea being that depending on his mood one night he will walk in and take the audience out for a beer and on a not so lucky night would walk in and tell the audience to fuck off. "That's my idea. Keeping up the element of mystery."

Jon's phone starts to ring. It's Ian ringing to tell him that the hooker has stopped breathing.

"Has it been interesting enough?"

Big and Daft are currently poised to descend upon Edinburgh this summer with the final chapter to complete the BAD trilogy. Judging by recent performances of work in progress the Big and Daft Christmas show promises to top their efforts of the last two years.