I'll e-mail you a pic of the consumer unit in our house complete with 20amp radial MCBs. It's not as complicated as the one I described but almost..
Personally I don't see any problem with the British or Irish approach to wiring a cooker. 3-phase is riskier if something goes wrong and someone contacts two phases. Over here we technically require an electrician to hook up a cooker even to just make the connections from teh wall to the back of the cooker itself and once everything's rated correctly there's never a problem.
I've seen baby bellings here hooked up to 13 amp and 16 amp plugs they don't consume much more than a kettle. Plenty of microwave/grill/oven combination units that use interlocking and cycling to make sure that only one mode of cooking is in use at a time too. If you want all 3 simultaniously you need to pay for a Miele / Gagenau etc and have it hardwired.
