http://www.orientatie.org/docs/sylvester/engels/index.html

Done this a couple of times. Bit of a secret in that they dont publicise it very well. Covered it in CompassSport FEB08 issue I believe. 5 Ranking events in a row - short classic races essentially except day 5 which for the elite is a Middle World Ranking Event.
Ask for a late start Day 1 - we got 1300 which was last starts last year. This would enable early channel crossing on Boxing Day. You could go out and just do some of the days of course!
Maybe 10 Brits were there last year.
Makes a nice change from the UK O scene and isnt very far - couple of hours drive - when you get over the channel.