That's one serious consumer unit !
When I first moved in I had three Bakelite fuses in which I would insert whatever wire I had lying around.
It used to smell of fish whenever I switched on the immersion heater for a bath.
When one day it started spitting out glowing bits of Bakelite, I put a bucket of water under it and finally went up Wickes and bought a new unit.
I still have only one ringmain for the whole house - that has the immersion heater spurred off it too, one lighting circuit, and one cooker spur that I have all my kitchen appliances running off.
I have over a dozen 4 way blocks in my main room, three in the kitchen and two in the bathroom.