Thanks for your comment, JohnW2
Yes, I've often looked down holes in the road and seen the multiple pipes/cables crossing each other.
I just got excited about the idea of using these sub-surface cable troughs, as they
a: seem easier than digging a 0.5m trench (I'm really quite lazy)
b: safer...
Lots of good advice on these boards about external wiring, but I've not found anything similar to my problem ...
I plan to install a shed about 7 metres from the main house where the electrical run would be across a tarmac parking space and lawn. I can't suspend the cable due to trees.
The...