Jason ran the Marathon for the National Leukaemia Trust with fellow actors Simon Merrells (Family Affairs), Jason Merrells (Cutting It), Tony Curran (Gladiator), Jason Barry (Titanic) and Dean Lennox Kelly (Deathwatch).
Jason was in make-up for 8 hours to get into his costume for the film League of Extraordinary Gentlemen.
Jason's father Gordon Flemyng directed the 1965 film Dr. Who and the Daleks.
Jason is uncle to his brothers daughter Ella.
Jason has a brother named Gareth.
Jason has worked with the Royal Shakespeare Company.
Jason attended the Christ's Hospital school.
Jason attended the London Academy of Music and Dramatic Arts.
Jason used to work as a bartender.
Jason can speak French.
Jason is 6'1".
Jason: Of the 40 feature films I've made, 15 of them failed to make it onto the screen and have only ever been seen by cast and crew. It is very frustrating when a film you really believe in remains unseen. That's not a problem with television. If you're a painter you don't paint a picture and then stick it under the bed - you want people to see it.
Jason: A film is like a mad arranged marriage, with all these people who don't necessarily want to be with each other forced into this intimate, exhausting process. Apart from Lock Stock and two Smoking Barrels- which was one of those freak occasions where everyone had a brilliant time - I've not been on a film where there haven't been arguments.
Jason: My fan website says 'site open since 1987, 37 visitors'. So I've got a very small but very dedicated group of fans I guess.
Jason: Acting was a way of talking to girls without being cool. Obviously there is the Ginger Freedom Front, but it was a battle until I was about 19 or 20.