I have been attending this event for the past 4 years, it is normally well attended by reenactors and veterans. Here is the link to the official web site http://www.rurallife.plus.com/rlc/ it is located in Farnham, Surrey and the whole place is set up like a small village with displays inside the buildings, they even have a fully furnished prefab which you can walk around and a small section of train track with running engine. It is all very laid back and I believe run by volunteers.
Apparently the Canadian army trained in the area prior to D-Day and there are mock ups of the Atlantic wall in the woods. I have also been told that the Band of Brothers was filmed in the area.