Earthing in bathroom

[jackpot]

I have recently installed double insulated light fitting in the bathroom (does not have to be earthed).
I am upgrading the bathroom and buying a new suite but my problem is Earthing. I have notice it is not presently earthed unless under floorboards but i doubt it is. I understand to Earth all pipework etc but how???

Question

1. Where do i start and finish? If I start for example in this order

Bath taps.. Earth both tap and carry on to........
Basin taps.. Earth these and carry on to.......
Radiator pipework (Thats about all i have in bathroom)

Does it just start and finish at these points or does it have to come from another supply of earth wire from another room or something and end somewhere else?

Please help

 

[Adam_151]

Good info on supp. bonding here; http://www.niceic.org.uk/downloads/NL139supp.pdf

EDIT: corrected truncated link

 

[ban-all-sheds]

Who's going to mention Part P?

 

[Adam_151]

I dunno, would it be morally right to say something that would stop him bonding his bathroom, seieng as bonding makes things safer, and I can't see anyway that you could cock the job up and make it worse than with no bonding installed...

 

[Bazdaa]

Who's going to mention Part P?

Errr you!