Hi, Yes I use
http://www.classicshowsuk.co.uk/ for events.
However only look at attending ones that are within striking distance from me and on Sundays only (Best day for me), may be the same for others too. Can't help to make a list though for people to be aware of.....
1/ Ragley Hall - 28th May
2/ Classics at the Crick - 11th June
3/ Trentham gardens - 18th June (Possibly for me)
4/ Kimbolton Car show - 9th July
5/ Beaumanor hall - 30th July
Cheers.