Best you will get is an Inspire for hire.......with a pilot attached I would think.
I do not know of any rental houses in the UK that will hire out a UAV since the risk premium would be prohibitive.
The other thing to bear in mind is that if you rented a platform how would you incorporate that into your ops manual?
There would not only be the information to append but also emergency procedure specific to that aircraft.
You would also need temporary insurance cover as your I shreds would need to be informed as well.
Not that easy.