Whilst fixing my bolier, a British Gas engineer (aka salesman?!) gave me a card advising that 'the gas installation pipe fitted in your premises does not appear to be cross-bonding to the electrical installation.' My electrical knowledge is severely lacking so I would like to know:
1) Is this a legal requirement and , if so, to what degree is it adhered to / enforced?
2) Can the work be done by anyone or does it require a approved contractor?
I strongly suspect this note may be more to do with sales than compliance!