Just out of interest, there is another meeting taking place the same w/e as Donington.
NG Road Racing are running a 2-day meeting at Darley Moor (also in Derbyshire) and it's only
£75 per class, which includes a
8 lap heat and a
10 lap final (and a practice - no qualifying).
Extra races are only another £40, so it's still cheaper to to 2 classes and get a practice - two 8 lap heats and a two 10 lap finals. Each day.
I know it's not Donington or DesmoDue, but it's shedloads cheaper, a very friendly club and professionally run.
I'm not suggesting a Donington boycott, but there are other options, if you want more laps for you money.
I'm 99.9% sure I'll be at Donington though