Brother in law and myself are looking for a track day, test day, sprint type of event in the Gloucester area over the next few months. This is for both to run our 205s, his to get a feel for a fully prepped rally car he's acquired and mine to explore the limits of my overhauled road car.

What can people recommend...?

Prescott hill climb just north of Cheltenham is a nice place.

http://www.prescott-hillclimb.com

Castle Coombe and Llandow both hold MSA Sprints (and well as Trackdays).

Or airfield trackdays run at Keevil or Hullavington...?

Thanks chaps, will start looking into them. The airfield days sound like a good bet for a first run.