The Farming Minister tells us DEFRA is working on a "nutrient calculator" which could help prevent further water pollution from farms and new housing developments. We visit the River Wye, where farmers supplying the chicken company Avara Foods are taking steps to reduce phosphate run off. It comes after campaigners blaming the pollution of the Wye on the increase in poultry units in the catchment. And, last year was a record-breaker for Brixham fish market, with more than 43 million pounds worth of fish coming through. But all is not quite what it seems. Presented by Anna Hill Produced for BBC Audio in Bristol by Heather Simons