Fair enough.Yes I meant my post on discrimination. (I just typed diversity again, don't know why I have that word in my brain)
Yes, your socket(s) must have RCD protection. Although it's not quite 'discrimination' in the usual sense (which most commonly refers to discrimination between two protective devices), there is a related issue ('separation of circuits') here. If you have the RCD at the house (or, indeed, on the incoming supply at the shed), then a fault on the shed sockets circuit which caused the RCD to trip would take out the shed lighting as well - which some people would regard as dangerous. On the other hand, if you had the RCD in the shed, and only protecting the sockets circuit (not the lighting), that problem would not arise.As for the RCD, it needed to be introduced for the circuit in the shed and I was merely pointing out that this had been considered (before anyone pointed it out). And as for the location it's just convenient to have it at the CU rather than fit one in the shed.
Kind Regards, John