Lots of countries... from a little googling I've sussed that it's training under the auspices of the "Tactical Leadership Programme".
Everyone turns up with loads of flashy kit and goes out to play together. Then again, there is a DA-20 listed for the UK... pity the pilot turning up in that
Click on TLP 2004/3 on this
TLP enthusiast site
Looks like they sent about 20 out on excercise on Thursday.