I am still planning to be at the Uxbridge Autoshow on Sunday 15th July 2012 in my Marlin Sportster.
http://www.uxbridgeautoshow.com/
The weather has been very wet and the organisers have promised to update their web page if cancelled due to muddy fields.
Anybody planning to attend should check the website before travelling and i'll post an update here if I hear anything.
...peter