In 2000, around 500 wine-growing operations with a total of around 1.000 hectares of vineyard area produced around 14.000 hectolitres of wine in southern England, Wales and on the Channel Islands (no wine is grown in Scotland or Northern Ireland). The vineyards are mostly on poor loess, sand and clay soils. The Gulf stream and the Atlantic ocean are moderating influences providing a mild climate, but the wet summers and rainy autumns are a problem as they encourage the spread of fungal diseases. There are six wine-growing regions: Weald and Downland (Kent, East Sussex, West Sussex), Wessex (Dorset, Wiltshire, Hampshire, Isle of Wight), Southwest and Wales (Hereford, Worcester, Südwales), Thames and Chiltern (Oxford, north of London), East Anglia (north-east of London to the north coast of Norfolk) and Mercia (Midlands, north). Primarily, light, flowery and fresh, spritzy white wines are made from Müller-Thurgau (the most widely planted variety) and numerous other modern German crossings, such as Reichensteiner and Schönburger, as well as from hybrids such as Seyval Blanc (second most widely planted variety). Chaptalising musts with sugar is common practice. Bottle-fermented sparkling wines made from Chardonnay and Pinot Noir are very popular. Not to be confused with genuine English wines are the so-called British wines, which are produced from imported grape must concentrate. Well-known wine producers include, for example, Barkham Manor, Breaky Bottom, Chapel Down (founded 1992, known fort he red wine „Epoch Fizz” and white wine made from the Bacchus grape), Denbies (largest wine estate), Halfpenny Green, Hidden Spring, Llanerch (in Wales), Northbroke Spring, Nyetimber, Penshurst, Pilton Manor, Sandhurst, Sharpham, Thames Valley Vineyard and Three Choirs (27 ha). Diageo, the largest spirits group in the world and major wine importer is located in London, and has shares in numerous wine estates in other countries.