After the summer heatwave, Master of Wine Susie Barrie meets winemakers bringing in what could be a watershed harvest for homegrown wine. On a tour of the south of England she visits Peter Hall who's been making wine for 40 years in his isolated Breaky Bottom vineyard in East Sussex. Just down the road we visit sparkling wine makers Nyetimber and Ridgeview, we get a lesson in winemaking from Sarah Midgley at Plumpton College and then to Frazer Thompson of Chapel Down in Kent and Patrick McGrath of Hatch Mansfield in Ascot who helped Champagne Taittinger plant vines in the UK.