hi hehehe! although there isn't really such a thing as non-alcoholic wine, you can buy so-called 'adult soft drinks', such as shloer: http://www.shloer.com/
it is available from most leading supermarkets, and comes in flavours which resemble wine, such as red grape, white grape and even bucks fizz for that extra bit of bubble!
sorry hehehe...maybe such a thing does exist. i've found this website, specialising in wines with a low alcohol content: http://www.lono.co.uk/default.asp
i'm not sure you can get totally non-alcoholic wine, but you can get de-alcoholised wine. this is wine that has the alcohol removed but a very small amount is left in (less than 0.5%). there's a lot of different wines at www.alcoholfree.co.uk
sainsburys(they r actually on the bws dept) do a few non alcoholic wines and im sure tesco, asda and morrisons do too, theres also shloer and appletiser which are sparkling