How to write to Keir Mather, MP for Selby

To write to Keir Mather, a Labour MP for Selby, address your letter to Keir Mather MP, House of Commons, London, SW1A 0AA. That reaches his office at Westminster. For local casework, many MPs also run a constituency office — its address is on his profile at members.parliament.uk. Say you are a constituent (your postcode proves it) and keep the letter to one issue with a clear ask.

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Mailing address

Verified July 2026

House of Commons — Westminster

Keir Mather MP
House of Commons
London
SW1A 0AA

Reaches the MP's parliamentary office at Westminster — best for your views on legislation, votes, and national issues.

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Sources

Addresses verified July 2026 against official sources. Always confirm on the official site before time-sensitive filings.

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Key facts

  • Keir Mather is a Labour MP for Selby.
  • Write to Keir Mather at the House of Commons, London SW1A 0AA — this reaches his office at Westminster.
  • Identify yourself as a constituent: include your full name, home address, and postcode so Mather's staff can confirm you live in Selby. Constituent post is prioritised.
  • Any UK resident may write to any MP, but for local casework it is your own MP whose office will act.
  • For local casework (benefits, immigration, council problems) many MPs also run a constituency office — find its current address on Keir Mather's profile at members.parliament.uk.
  • Unlike some countries, post to a UK MP is not free — a normal stamp applies. PostPal prints your letter and posts it via Royal Mail the next business day for £4, no printer or stamps needed.

How to send your letter

  1. 1

    Choose Westminster or the constituency office

    Writing about a bill, a vote, or a national policy? Use the House of Commons address — it reaches Keir Mather's parliamentary office. Need help with a personal casework matter (benefits, immigration, a council dispute)? Many MPs run a constituency office; find its address on Keir Mather's profile at members.parliament.uk.

  2. 2

    Say who you are and where you live

    Open with your full name, address, and postcode. MPs' offices sort post by whether the writer is a constituent, and your postcode is how they confirm you live in Selby. If you are writing to an MP other than your own, say why their role or seat matters to your issue.

  3. 3

    Keep it to one issue with a clear ask

    One page, one topic, one specific request — support or oppose a bill, raise a question in the House, meet you, or take up your casework. A short letter with a concrete ask gets a real reply; a multi-issue essay gets a standard response.

  4. 4

    Send it without printing anything

    Write your letter in PostPal with Keir Mather's address prefilled and we print, envelope, and post it via Royal Mail the next business day for £4 — no printer, envelope, or stamp needed.

Common questions

What is Keir Mather's mailing address?

Keir Mather MP, House of Commons, London, SW1A 0AA. This reaches his parliamentary office at Westminster. For local casework, Keir Mather may also run a constituency office — its address is on his profile at members.parliament.uk.

Do I need a stamp to write to Keir Mather?

Yes — post to a UK MP needs normal postage; there is no free-post to Parliament for the public. PostPal handles the printing, envelope, and Royal Mail postage for you for £4 if you would rather not sort it yourself.

Do I have to live in Selby to write to Mather?

No — anyone may write to any MP. But MPs' offices prioritise their own constituents, and casework (benefits, immigration, council issues) is normally only taken up for residents of Selby. If you live elsewhere, find your own MP at members.parliament.uk, or write to Mather specifically about his role in an issue that concerns you.

Will Keir Mather actually read and reply to my letter?

Constituent post is logged and answered by Mather's staff, and issues raised repeatedly get flagged to the MP directly — a personal letter carries more weight than a form email or a petition signature. Include your return address (PostPal prints yours automatically) so the reply has somewhere to go.

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