James, you don't the chance to choose! The one I attended was run by the Leicester, Leicestershire & Rutland Safety Camera Scheme. The course is an alternative to the fine and penalty points. You can elect to pay £60 and take the course instead of paying £60 and receiving the points.
The offer of attending a course is only made for low-level speeding offences. Those who are eligible receive a booking form with their penalty offer from Leicestershire Constabulary.
Overall the course was very informative and not patronising in any way. It certainly changed the way I drive in 30mph zones. I was offered it as I was caught with a laser gun doing 34mph. It was explained that the limit was 30mph + 10% and 1mph over i.e 34mph. Any more and I would not have received the alternative choice. The course is only allowed to be attented once, after that if you are caught again - fine and points!