Why has my ring been split?

[plugwash]

In fact I was once discussing four conductors in a 32A MCB Fuseway on a consumer unit - to wire a ring final as two rings on one breaker in the central portion of a house rather than one larger simple ring design.
One fellow was adamant he would "correct " it by by making a joint of connecting one leg of each ring to make it become one larger ring.
I pointed out that this would only increase R1, R2 & Rn therefore Zs and not be of any benefit but I am unaware if he was convinced.

I'm not a fan of two rings joined end to end as a circuit design, it seems likely to leave a rather unbalanced ring, especially if one ring has much longer "tails" than the other.

Two rings in one breaker seems fine from a "it's no worse than a conventional circuit" standpoint, but there is the question of whether it qualifies as a ring circuit and hence qualifies for the dispensation that allows a ring circuit to be wired in cable smaller than the breaker rating would normally permit.

 

[Why Not Indeed]

But I did want to mention that he should of used Lube!

Basically the only reason I clicked on the thread, to make sure someone had mentioned this.

 

[ebee]

I'm not a fan of two rings joined end to end as a circuit design, it seems likely to leave a rather unbalanced ring, especially if one ring has much longer "tails" than the other.

I do not follow the unbalanced ring comment here.
Whilst on a bog standard ring I agree that attempts to balance are a good idea, If two rings are at one fuseway and each one has some balance consideration in its own context then I do not see any balance of one ring against the other as having the same merits, if I have understood your comment correctly