SSD
Could not make SU this weekend for family reasons and am a bit surprised to read about your bad experience. Been a fair few times and have never come across this sort of thing before.
I dont know if it is their rules but if it is you can only suck it. I do have to point though that I am slightly surprised by it. If it is not in their rules it was just bad manners. Surely to let an agile Chippy disappear can not unduly delay the operations at Duxford I would have thought.
If you want to experience some longer ATC delays you can always try some of the other big training fields.
FD