That's the charge out rate levied by Derbyshire police force if you want policing for a parade at Ilkeston.
Seems a bit excessive to me. Would the six officers really have been paid this hourly rate, or does this price include our friend Contribution to Overheads?
There's a public interest element here. Policing for events should be provided at the lowest possible cost.
Of course, Derbyshire police couldn't be subjected to a competitive tender.