In article , "Andrew McKay"
says...
On Sun, 17 Oct 2004 20:41:48 +0100, Aardvark
wrote:

Should I get an earth strap and earth these lights to the incoming
water supply pipe, or do the regulations / best practice say I should
do something else.

Best way is to find the most convenient socket which has an earth to
it and bond it there.

Until someone decides to rip out that socket.