These courses are mostly waste of time and money. All they teach you is how to pass the exam and it's a long road.
Go through the civil service or military route. Get a post with high level security clearance and spend some years working for the MOD, Home Office, etc. They have jobs all over the world too. Then you can walk in to the top paying contracting jobs if you want to. People with these agencies (plus experience) on their CV are pretty much made.
You don't need many qualifications to get in the door and they will pay for courses you want/need.