Final ring circuit - can they be simplified to loads in parallel with each other?

Not quite sure what you are asking.

Even radial circuits have loads in parallel.

The concept of a ring is that the resistance of the circuits is fairly constant throughout, although in fact the graph is a pretty flat elipse. The idea is that you have two circuits in parallel and as the resistance of one rises, the other one falls.

Unless you have a long thin ring (down a corridor, for example) they tend to use less copper than a radial.

Frankly, in some ways, they are more bother than they are worth.

Not quite sure what you are asking.

Even radial circuits have loads in parallel.

The concept of a ring is that the resistance of the circuits is fairly constant throughout, although in fact the graph is a pretty flat elipse. The idea is that you have two circuits in parallel and as the resistance of one rises, the other one falls.

Unless you have a long thin ring (down a corridor, for example) they tend to use less copper than a radial.

Frankly, in some ways, they are more bother than they are worth.