Can anyone suggest a realistic scenario where supplementary bonding would be required in a bathroom or other 701 location? I'm failing to think of one, although I may be overlooking something blindingly obvious.
It can be omitted as long all three of these are satisfied: ADS in time; RCD present; any extr-c-p connected to main bonding.
If ADS can't be done in time by either MCB/RCD then its not legal anyway.
RCD has to be present anyway.
Water and gas pipes etc should already be main bonded if they introduce a potential.
