Thanks JayJay.
Just found the dates for 2011 - March 20th and October 23rd (but I guess these could be subject to change so best check the web before going)
Info below taken from
http://www.realclassic.co.uk/events.htmlMarch 20th 2011 - The South of England RealClassic MOTORCYCLE SHOW AND BIKEJUMBLE opens at 10am at the South of England Showground near Ardingly RH17 6TL, close to Gatwick. Big displays of British, European, Japanese and American classics: extra indoor space for the club displays, trade stands and autojumble stalls. Plus Guest of Honour, free parking on firm ground, bring your bike to sell, garage clear-outs welcome. All pre-booked display bikes go home with a souvenir plus have the chance to win one of the handsome awards across a range of categories. See
www.elk-promotions.co.uk