What's with the Leon selective carpark opposite Beresford Road?

So, opposite the bottom of Beresford Road, where it looks like there used to be a Hawes and Curtis outlet store (I haven't lived in the area for too long so can't confirm this 100%), there's a changing lineup of cars, and a small sign in the window of the building that says "Leon Selective". Some intensive googling later, I learn that Leon selective is a car dealership, so all well and good, but has anyone else noticed that they have overnight dog security on the premises?! 

Also, when I walk past in the morning (usually around 6.30/7.00am) a couple of times i've noticed people up on the roof of the building keeping an eye out on things. 

I mean i'm sure it's all legit, but just seems a bit over the top, unless guard dogs are de rigueur for car dealerships these days?