National Accreditation Council for Certification Bodies,
Audley House,
13 Palace Street, London SW1E 5HS
Tel: 020-7233 7111 Fax: 020-7233 5115
National Physical Laboratory,
Teddington, Middlesex TW11 0LW
Tel: 020-8977 3222 Fax: 020-8943 7134

Information on standards:

BSI
389 Chiswick High Road,
Chiswick, London W4 4AL
Tel: 020-8996 7022 Fax: 020-8996 7048