In message , Steven Briggs
writes
To quote from "Commentary on the IEE Wiring Regulations" (Paul Cook)
"There is particular requirement that the supplementary bonding itself
be carried out within the bathroom, simply that the parts themselves be
supplementary bonded. Supplementary bonding maybe installed underneath
floorboards, above ceilings or in an adjacent airing cupboard, as long
as it is accessible for inspection"

"Use can also be made of copper pipes as the supplementary bonding
conductor if the joints are electrically continuous"



Aarrgghh
That should read:

"There is NO particular requirement......"


--
Steve