Actually, I didn't expect it to be so easy to find out..... the radio had said this morning that the site had crashed as so many people were looking at it yesterday but now at http://wikileaks.org/leak/bnp-membership-list.txt it includes:-

Mr
Mark
Stevens
12 Dundrey Crescent
Merstham
Surrey
RH1 3NY
01737 217728
markyemorris@hotmail.com
Activist
BSc (Hons) Media Production. HND Moving Image/Photography. Semi-professional multi musician (traditional/British folk). Pagan. Classic motorcycle enthusiast. Huntsman

I met someone calling themselves "Mark Ye Morris" at Tenterden Folk Festival a few years ago and he subsequently sent me a couple of CDs for review. However, the quality was not there so they never reached print. I'm glad now that they didn't.