We missed this one last year. Mike Barnes attended all three days last year, and declared them not to be missed. Last year advanced tickets saved 5 quid; prices on the day were:
Entry Grandstand seat Fri 18 practice 15.00 15.00 Sat 19 practice & race 25.00 20.00 Sun 20 race 35.00 30.00Hope they are no more this year
Preference would be for the Saturday.