UK Vineyards Association - UKVA http://www.ukva.org.uk The UKVA welcomes all who are interested in grape and wine production in the UK, large or small producers, and non-producers who wish to be involved and informed. Members join the UKVA via their Regional Association, where they also benefit from local networks, events and publications.
Lon Rombough - an American enthusiast and breeder with a very informative web site http://www.bunchgrapes.com . Sadly Lon died in 2012. His book 'The Grape Grower' A guide to Organic Viticulture lives on.