Smoggie89:
Morrisons wakefield take our keys when we are in the back pallet trucking off lol
They do that at Sainsbury’s stores as well, although not many of the backdoor staff enforce it for the policies sheer lunacy. Was quite taken aback one day when I was pulling cages off and a keen young manager came in barking at me to hang up my keys. First i’d heard of it & I couldn’t believe it, I said “the cabs locked and i’m here, what difference does it make if the keys are in my pocket or on the hook?”. Sainsbury’s store staff aren’t even allowed on the back of the wagon. 
It’s a common thing here, I have had many arguments at various RDC’s. In the refinery I haul out off they lock the red line of dry van trailers so the driver can run his engine to keep warm in winter and cool in summer but in the tanker loading bay’s that I use they take the keys off just to be spitefull LOL, that’s not so bad in the hotter weather because we can just stand be the river in the shade, the cool breeze from the Hudson lowers the temps a bit but in the winter it’s damm cold, I bought an independent heater and had our mechanics fit it in my old truck, now I have a new truck I will need to buy a new one.
Clunk:
As a forkie now, I find the best method which doesn’t get argument from drivers, is to give them my tea machine key and tell them to get a brew. They are tipped by the time they get back.
Good call that man, if only more were the same.