Hmm, valid points. I'm just trying to figure out the best way to get the shed powered without blowing the bank. My plan was basically to do the bulk of the work myself and then to get in a fully qualified spark to inspect, test and sign off. Cant really afford to have all the work done for me as itd cost hundreds just to get a guy out let alone actually touch anything haha.
Total load on the cable should be less than 26amp though as the only mcbs on the shed end are 20 and 6. Hadnt taken into account the RCDs in series, been a while since I read my 17th edition, 18th now too. I'll just get a unit with an 100amp isolator instead.
Shouldn't concern you though, its just a practical question. Just wanna know if anyone has any ideas if I can avoid carving a trench through the floor or wall to run it.
What ever I do its gotta be better than the previous owners solution of traipsing an extension cord out the window and around the garden to the old shed :/