No, I'm unsure if there is any recourse here in the UK other than making a complaint to the independent police complaints commission but, then again, the IPCC did absolutely fuck all when I've previously reported officers eating out of Tupperware whilst driving for instance. They investigate themselves, they never find anything amiss, funny how that works out each and every time.  Law unto themselves.  So no real point in reporting anything, my name would just be on another list somewhere.  And I didn't want to engage with the commander who was there, I've complained to him before about other policing issues and was told to do one.  Looking at the web for clues on police horses just mentions the sourcing of their Irish breeders, so I might develop a few freedom of information requests to get some answers.