Yes I have done the LANTRA L2 center-fire/fox control course they are run by a gent who is based on then Glos./Worc. border and the courses are run at various locations, I did mine at the Criggion Estate in Wales, failed some modules, and then completed the course a few weeks later at the Corinium Range in Cirencester (Glos.).
Frankly, the practical side of the course is tough, (night lamping, range estimation in the dark, marksmanship) and aimed at professionals working in estate vermin control. The theory side is not too hard. But then for some it may be the other way around
For me, as an amateur, the outcome has been that it greatly helped me getting deer stalking permissions and I felt it was an excellent course to do between the DSC1 and DSC2 (I am doing the DSC2 now).
I also do a lot LESS lamping for foxes now as am so much more aware of what can go wrong and simply feel quite uncomfortable going out at night with a few mates who do not understand the safety issues when lamping from a vehicle.
I will PM you the contact details of my local instructor.