Hi,
Thanks for the quick reply :-)

The cable will run about 10m or so from the house's consumer unit to
the shed. I've already wired the shed in a radial circuit with 6mm
cable (a little big maybe, but I had it to hand). That circuit is only
about 4m.

The sockets in the shed will have to cope with a (small) table saw,
bench drill, uv exposure box and a tv. I'm working on some video
electronics stuff (12volts I'm ok with... but 240 _scares_ me!). Not
all of the above will be on at the same time tho

As for the MCB at the house end, the whole story is that I'm going to
change over the consumer unit in the house (before I connect up the
shed) to one with RCD protection because at the moment all my sockets
upstairs and down run off a single fuseway, as do the lights (I'll
change it to a split load one with the lighing in the house running off
2 unprotected MCB's and the remaining of the ciruits (sockets down and
up, shower and shed) off the protected ones.

Am I barking up the right tree? :-D