OK in which case there are some standard things to check.
Firstly, that there is only one afcad for EGXC. There are several ways of doing this but the easiest way is to use afcad or afx and search for EGXC. If there are more than one they will tell you.
The next thing to check is that you have your traffic percentage set to 100% in FS9. if not it will reduce the amount of traffic you see.
Check to see if you have got any other EGXC scenery installed that could be affecting this.
The next thing I would do is go here ,
http://aifs.pvdveen.net/, and download ACA2005 Aircraft Analyzer 2005 and run it against your system to see what errors it picks up.
My feeling here is that you haven't added the scenery. The reason being that you would get some aircraft appear at Coningsby, plus the Jaguar traffic bgl is installed in the scenery folder. If you don't install the scenery you will not get the Jaguars.
Let us know what you find.