I went to a couple of shows this year with a friend that has an Austin Healey both were very good apart from the lack of a single Crossfire.
Helmingham Hall Gardens. Good show and had in informal sprint up the driveway that was quite entertaining. It is usually an anual event arround the same time of year.
The other one was at Little Gransden near Bedford Little Gransden Charity Air & Car Show 2012
The vehicle show was ok suffering from the distinct lack of Crossfires (apart from mine in the car park) and when we walked back to it at the end of the day there were people round it keen to ask questions. A funny thing was on the way to the show we stopped in a small cafe called Wally's in Acton near Sudbury for breakfast & when we came out there was another SRT roadster in the carpark & straight away recognised the plate as Dal (Good to meet you by the way) had a chat about how great the cars were before continuing to the show & not seeing another Crossie all day.