I've found a country fair at Althorp house, but it's a bit of a faff getting there, and not very cheap to get into either.
I've been googling to no avail, but it's end of May, there MUST be other country/steam fairs going on around this part of the country tomorrow aren't there??
Is there one near you? Want to take the DS's out tomorrow have a fun "birthday weekend" for DS3.......