About to wire up the new kitchen (yup, all under BCO and needing part
P signoff) and all the sockets are mounted and conduit in place.

I now have a choice

4mm T&E radial on 32A RCBO

or

2.5mm T&E ring on 32A RCBO

both seem equally valid according to regs and my calculations.

I can see the argument both ways, the ring is more traditional for UK
but entails longer checks and radial in simpler but entails getting
hold of some 4mm T&E (need to order it I think, nobody seems to stock
it round here).

Whats the feeling on this here?

Ta