Guys and girls I'm sorry for my poor attendance to class, having said that.
Just 1 rcbo trips, I connected L and N at 1 side of the circuit and simply tested continuity with the plug in lead, done the same test on the other side of the ring, I have found the break on the LL but repairing it isn't possible without damage to carpets or walls that the client isn't prepared to do, it could be a junction box. Yes. So I decided to split the ring into two radials, but 1 rcbo trips and can't understand why.
I did do I end to end on LL and got 33.7 ohms before the mains change, I then done a full accessory swap and now have open ring, I then checked all the sockets I swapped and there doesn't seem to be a break behind them.
I didn't check for a ring when installing the accessories, i will say that all the lives, N and E were twisted together before my works. The possibility of a break after the fact is high would you agree? I just don't know if to continue with finding the fault giving the clients limitations, or finding why 1 rcbo trips when splitting the ring.
Cheers