TFC,
Well in view of your occupation, I have to be careful with my reply
--however, I have to say I can't recall this procedure being a part of CAIPS--but ---they are very lengthy books so I suppose I could have missed it----
however, the cost was neglible as the company duly supplied the fluid involved--so to speak---
---so if you can overlook this little fact, I won;t log a complaint for low flying next time you are doing low orbits over certain parts of the M60 and your bright and shiney machine distracts me from driving --or wakes me up at 03.30 hrs !
Must be the best job in the Police I reckon