Hi Lordy
You may have already completed a CP course but if not, I recommend ITSQ (International Training Sec Qual) based in Norwich, Norfolk. Owners/Trainers are ex-army and seriously know their stuff and have vast experience and knowledge.
I completed my course with them last year and am very happy with the content and delivery on the course. They have an operational side, Scorpion Protection International so are operational too.
Hope that helps
All the best
Pash