Any queries from ADS holders should be directed to The Bank of New York, National Grid's US Depositary:
The Bank of New York
Shareholders Correspondence
PO Box 11258
New York NY 10286-1258
telephone: 1-800-466-7215
(for international calls: +1-610-382-7836)
email: shareowners@bankofny.com
web: www.adrbny.com