House of Commons Information Office

The House of Commons Information Office (HCIO) provides information on the work, history and membership of the House of Commons.


The HCIO provides information about the House of Commons, its work, membership and history by dealing with enquiries. We can also help you find your MP and we also produce publications about Parliament.


The HCIO produces a range of useful publications and information lists to help the public understand the work of their local Member of Parliament and how the House of Commons operates.

Contact us

The HCIO can be contacted by telephone on 020 7219 4272, by email at or by letter addressed to House of Commons Information Office, House of Commons, London, SW1A 0AA.

Find Your MP

Related information

Contacting the HCIO
  • Telephone: 020 7219 4272
  • Email:
  • Text phone: dial 18001 followed by 020 7219 4272

The HCIO produces a number of publications that include:

The Sessional Information Digest ceased publication in 2012, but previous editions are still available online.

HCIO Statistics

The HCIO aims to answer all reference enquiries promptly, courteously and accurately.

In 2011 the HCIO answered: 

  • 27,085 phone calls
  • 8192 emails, 7541 of which were answered within one working day
  • 136 letters