The Chancellor of the Duchy of Lancaster has written to Dominic Grieve QC MP and Hilary Benn MP, in response to the Humble Address Motion passed on Monday 9 September 2019. This is related to the request for the Government to release documents and communications associated with the Yellowhammer operation.
Operation Yellowhammer is the codename used by the Government for contingency planning in the event of the UK leaving the EU without an agreement. It is supposed to represent “worst-case” scenarios.
Dominic Grieve’s Humble Address (arcane Parliamentary jargon)
That an Humble Address be presented to Her Majesty, that she will be graciously pleased to direct Ministers to lay before this House, not later than 11.00pm Wednesday 11 September, all correspondence and other communications (whether formal or informal, in both written and electronic form, including but not limited to messaging services including WhatsApp, Telegram, Signal, Facebook messenger, private email accounts both encrypted and unencrypted, text messaging and iMessage and the use of both official and personal mobile phones) to, from or within the present administration, since 23 July 2019 relating to the prorogation of Parliament sent or received by one or more of the following individuals: Hugh Bennett, Simon Burton, Dominic Cummings, Nikki da Costa, Tom Irven, Sir Roy Stone, Christopher James, Lee Cain or Beatrice Timpson; and that Ministers be further directed to lay before this House no later than 11.00pm Wednesday 11 September all the documents prepared within Her Majesty’s Government since 23 July 2019 relating to operation Yellowhammer and submitted to the Cabinet or a Cabinet Committee.
Michael Gove’s letter to Dominic Grieve
and his letter to Hilary Benn
In addition the document relating to operation Yellohammer was released and is available at
(local copies available)