I have given up all hope of the sparky coming to finish off the shed and sick of tripping over three extension leads, so, Bunnies (yes Bunnies) came to the rescue with an Arlec 12m extension lead with a switched power point every 2m.
Rated at 10amps, I got one and will see what it is like.
Go and have a look, $29.95 each, cheapewr than a sparky.
I plan on running the lead iin a channel and attaching the power point to a wooded block on the wall, end of lead will plug into existing power points.
I only plan on running one thing at a time so overloading is not going to be an issue.
Power points are fitted with lugs for screwing to walls.