NT wrote:
The bonding should be done where the service enters the house.

"Where it enters" says to me just immediately before it goes through
the brickwork, ie on the outside of the brickwork. Does it actually
mean "immediately after it enters", ie on the inside of the brick
work? Certainly all the bonding clamps I've ever encountered are
immediately after the service enters - *and* on the consumer side
of any cut-off tap. After all, it's to bond the internal pipework,
not to use the external pipework as a ground.

JGH