[ben1990]

The most likely use of the crane is to move around bigger items such as platforms and steps, or even fencing at the front of the house, as the crane looks too far away to be lifting anything in or out of the garden.

There would be little point lifting anything into the garden anyway because most walls can be opened away relatively easily and much of the interior 'set' is built inside anyway.

There is actually another gate i think because the back gate to Elstree Studios is literally 2-3 metres from the garden and the gate looks different to this one.