I've done a few PIR's with the following Bonding arrangements (mainly on flats for some reason), just for my clarity what is acceptable and what code would go against it.
1. Water bonded in 6mm to CU continuous cable linked to Gas Pipe - install approx 1985
2. Gas Bonded in 10mm to Earth Bar, Separate 10mm Cable from Gas Earth Clamp to water pipe - Approx install 2005
3. Gas Bonded in 10mm to CU, Separate 10mm Cable from gas Earth Clamp to water pipe - Approx Install 2010
4. Water bonded to CU continuous link to Gas in 10mm - Approx Install 2010
Cheers
1. Water bonded in 6mm to CU continuous cable linked to Gas Pipe - install approx 1985
2. Gas Bonded in 10mm to Earth Bar, Separate 10mm Cable from Gas Earth Clamp to water pipe - Approx install 2005
3. Gas Bonded in 10mm to CU, Separate 10mm Cable from gas Earth Clamp to water pipe - Approx Install 2010
4. Water bonded to CU continuous link to Gas in 10mm - Approx Install 2010
Cheers