For most people, a 25th anniversary is an opportunity to look back and reminisce - but not David Rodigan. Last weekend found him onstage in front of a sell-out crowd at the Ocean venue in east London, competing with four of the top reggae soundsystems in the world in a bid to win the UK Cup Clash 2003. It may be a quarter of a century since the veteran reggae broadcaster first took to the air on Radio London back ...