There is already power in the summerhouse (okay - fancy shed) and there is a breaker. Slightest thing and it trips the switch in the house. there was also a supply running from the summerhouse to a pond pump. I filled the pond in when I had the twins so there is a bit of armoured cable then a box thingy and a bit more armoured cable out in the garden half way to the greenhouse. I have a well built wall running down that side of the garden. Can the armoured cable be fixed to that rather than buried 3 ft in the ground?? I wish DH knew something about DIY!