Emails and letters for the Chancellor and his ministerial team come in the first instance into HM Treasury's Correspondence and Enquiry Unit and then are sent into the Chancellor's Private Office. All correspondence received is replied to, within 15 working days and so you will receive a response.
To email the Chancellor or the ministerial team, the address is:
ministers@hm-treasury.gsi.gov.uk
and to send a letter the address is:
Rt Hon Gordon Brown MP
Chancellor of the Exchequer
HM Treasury
1 Horse Guards Road
LONDON SW1A 2HQ
You can also fax correspondence on 020 7270 4580