i've got  shed/workshop that it would be useful to have power in, as it is a bit antisocial to start up the generator if i want to be working in there late in the evening.

the workshop is about 50m from the house, or 65m from the CU, depending on how you would need to look at it.

it's only going to be supplying a single striplight and a single double socket, so i'm guessing the cable doesn't need to be any bigger than 2.5mm?

does this have to be armoured cable, or is it acceptable to run "normal" t+e inside a conduit of some kind?  years ago in a previous house the sparky ran t+e inside blue mdpe when running a supply to my garage

for a small load such as this, would it be acceptable to put a fused spur  from one of the sockets at the back of the house, or would it need to be supplied separate to the main house electrics?

just trying to work out if i'm likely to be able to afford it before i speak to the sparks

to be honest for the extra cost i would stick a 6mm 3 core swa back to the board on a 20A mcb at the minimum in.

the work is in the trenching.

I did something similar. Found this helpful...

http://www.google.co.uk/url?sa=t&rct=j&q=electrical%20supply%20to%20outbuilding&...