Over the history of the event, there have been a number of changes that are in many ways reflected in the list of previous winners. For example initially the event was only open to police cadets, before later becoming open to regular officers. Later still new categories were introduced for Ladies teams as well as mixed teams.
The route itself has change over the years, each time having an effect on the predicted winning time. The current route is undoubtedly the longest and any team able to finish in less than 6 hours will truly have to demonstrate the event aims of fitness, teamwork and endurance.
Through the years many forces have been represented and many return year after year. Surprisingly, many of these (often with great success) come from areas not renowned for mountainous terrain.