We typically have a ring circuit each for upstairs plugs, downstairs plugs, upstairs lights, downstairs lights, and then perhaps some special purpose ones - ove

We typically have a ring circuit each for upstairs plugs, downstairs plugs, upstairs lights, downstairs lights, and then perhaps some special purpose ones - oven, smoke alarms. There's a main breaker for the house, then RCDs for each circuit. Each appliance has a fuse in the plug, and it's not uncommon for the appliance itself to have a fuse in its body.