Gavin Grey: UK correspondent on the renewed concerns surrounding the Seine's water quality during the Paris Olympics

There's a fresh wave of concerns about the water quality in the Seine for the Paris Olympics.  A training session for the Olympic triathlon event has been cancelled due to unsafe levels of pollution, with heavy rain from the opening ceremony reviving recent fears. UK correspondent Gavin Grey says tests have confirmed the water is not up to scratch for swimming in. LISTEN ABOVESee omnystudio.com/listener for privacy information.