I qualify with these three events all found on 22-Jul-2012:
Event GC32000 Geolympix Banbury Cross Webcam-Flash Flash-Mob
Mega GC22T2T GEOLYMPIX MEGA : OXFORD 2012
CITO GC3P05Y Geolympix 2012 CITO - Giving something back
It started to get quite a bit muddier on the way to this one. Then when I arrived it took me ages to find it. I thought I'd gone through everywhere three times. After about ten minutes or so I was thinking of giving up but then I noticed there was a place I hadn't yet searched. Of course the cache was there.
That wasn't the end of my uselessness thought. I set off to the next cache (writing up a few notes on the cache sheet as I went). I'd already walked off around the corner and then realised I didn't have my GPSr with me. So I retraced my steps and found I'd left it next to the cache. Phew.