10 AUGUST 1991, Page 21

On tap

SOME people don't know they are in business. That seems; to include Thames Water, which still finds the idea unfamiliar. It is worried by official complaints (from its consumer panel — don't all volunteer at once) that when some of its customers turn on their taps, shrimps come out. What is Thames to do about them? Simple. Call it a home delivery service, and charge extra.