Nick Hand and Ellen Bills run the Let­ter­press Col­lec­tive in Bris­tol.  They run cours­es, under­take print­ing and organ­ise a print fes­ti­val each year.  Nick sus­pects (and I agree) that he is the only print­er to have a ful­ly fledged bicy­cle with a print­ing press on that has rid­den from Bris­tol to Mainz print­ing along the way.