Well i have no idea whether you would be able to control it but a pressure washer attached to a long pole might work. They create quite a lot of force though so you would need a very stiff pole and probably several friends to help you hold the pole!
It would amuse your neighbours if nothing...
Hi,
I am planing a new ring for my kitchen (all to be notified and above board) i am also putting in a new single oven 2.8kw and a gas hob. I was anticipating putting in a radial for the oven but since it can be wired to a 13A plug i am now considering placing a dp switch on the ring above...