I honestly don't know if dentists in the UK use or can get DiamondLite, but I think I found the company's contact information, in case you want to give it to your dentist:

DRM RESEARCH LABORATORIES, INC.
29 BUSINESS PARK DRIVE
BRANFORD, CT 06405
203-488-5555

Laura Clement
Author, HART Master Reference
Mercury Detox Supplements
My Favorite Amalgam-Illness Book
laura@herballure.com
1-800-358-4278 (U.S. & Canada)
1-207-584-3550 (Worldwide)
1-207-584-5552 (24-hour Fax)