The Mark described above is indeed Mark Stevenson, walker, bodhrán player, whistle player, singer, songwriter, poet and my cousin. He's got a wealth of amazing stuff in his back catalogue with his friends/ group The Tree Frogs who still play in and around Ledbury in Herefordshire. Give him a listen on MySpace or if you're within travelling distance go and soak up the atmosphere at his gigs.
http://www.treefrogsmusic.co.uk/ I'm biased, it's true but I'd still like him if he wasn't a relative.