As commuters fume in traffic jams and juggernauts thunder through narrow streets, a great natural highway runs through our capital city, unnoticed and virtually deserted. With the last docks under sentence, the question of the future of the Thames becomes urgent.
East-enders, business men, jet-foil captains and tug-skippers all have their own ideas, but all are agreed on one thing - it's time we stopped the decay of a beautiful, priceless national asset. Reporter Nick Ross
Producer JENNY BARRACLOUGH