John Stewart has been campaigning on transport and environment issues for thirty years. He is a former Chair of Transport 2000 and of the road victim charity, RoadPeace. He currently chairs the UK Noise Association and is a Vice Chair of UECNA, the European body which represents airport campaign groups. He headed up the coalition which defeated plans for a third runway at Heathrow Airport. In 2008 he was voted the UK's most effective environmentalist by the Independent on Sunday. For the last three years from 2008 the Evening Standard nominated him as one of London's 1000 most influential people.