Dick,
I've never hunted a "preserve" or the UK style of driven hunts. I thought I'd hunted only true "wild" birds until last year when the landowner of the place I hunt in SD told me that the state raises and releases thousands of birds just before every season to supplement/maintain the numbers. Who'da thunk? I've never been thrilled with the idea of "preserve" hunting and after seeing Shotgun Journal, where Bruce and his sidekick shot "driven" birds in the UK, I have no desire to stand in a field and have someone load my gun and others beat the brush so I could kill without working up a sweat. I'd prefer to eat a clay disk first.

The US version of the "preserve" seems to make more sense in the off season to me for the purposes Steve mentioned, now that I have a pup to train.