In electricity supply, a ring final circuit or ring circuit (informally also ring main or just ring) is an electrical wiring technique developed and primarily used in the United Kingdom that provides two independent conductors for live, neutral and protective earth within a building for each connected load or socket.
This design enables the use of smaller-diameter wire than would be used in a radial circuit of equivalent total current, which considering we are on 240 volts is very small indeed. Ideally, the ring acts like two radial circuits proceeding in opposite directions around the ring, the dividing point between them dependent on the distribution of load in the ring. If the load is evenly split across the two directions, the current in each direction is half of the total, allowing the use of wire with half the current-carrying capacity. In practice, the load does not always split evenly, so thicker wire is used.
So, we use fewer breakers with less and thinner wire. Before you get all high and mighty, remember that all devices that we plug in are individually fused. The plug on the kettle, for intance, will have a 13 amp fuse in it. The plug on a radio might have a 1 amp fuse in it. Unlike the US where plugs are not fused and everything relies on the breaker, which means our poor little radio in the US gets the full 15 amps plus if it develops a fault.
If you hadn't thrown our tea in the water, you'd know this.
I actually prefer your system though because you need to be less clever to use it.