我想請問ABRSM既head office(UK)網址和email

http://www.abrsm.org/?page=regions/uk/eng

You can send them an E-mail via: http://www.abrsm.org/?page=home/contacts.html

For your reference:

London office:

The Associated Board of the Royal Schools of Music
24 Portland Place
London W1B 1LU
United Kingdom

Telephone +44 20 7636 5400
Fax +44 20 7637 0234

Hope this helps.