Diego Garcia Military Base and British Indian Ocean Territory Bill

How the Lords voted

6 formal votes in the House of Lords on this bill, newest first.

These are the occasions when peers formally divided and every vote was recorded. Most decisions in the Lords, including on many amendments, are agreed without a recorded vote, so they do not appear here.

• 12 January 2026Government defeated

  Lord Callanan moved, as an amendment to the motion that this Bill do now pass, at end to insert “but that this House regrets that the UK-Mauritius Agreement concerning the Chagos Archipelago including Diego Garcia does not secure the long-term future of the Diego Garcia Military Base, creates uncertainty over the continuing unrestricted use of the Military Base and imposes £35 billion of costs on UK taxpayers for which the Government has no mandate, and that the Government failed to consult the Chagossian people before signing the Treaty”.

  Peers' vote370 peers

  Content · 201Not content · 169

  Conservative 171 content, 0 not content · Labour 1 content, 147 not content · Crossbench 15 content, 20 not content · Non-affiliated 7 content, 1 not content · Democratic Unionist Party 4 content, 0 not content · Ulster Unionist Party 2 content, 0 not content · Bishops 1 content, 0 not content · Plaid Cymru 0 content, 1 not content

• 5 January 2026Government defeated

  Lord Purvis of Tweed moved amendment 50, after clause 5, to insert the new clause Parliamentary oversight and approval of expenditure.

  Peers' vote258 peers

  Content · 131Not content · 127

  Labour 0 content, 120 not content · Conservative 82 content, 0 not content · Liberal Democrat 41 content, 0 not content · Crossbench 3 content, 4 not content · Non-affiliated 2 content, 1 not content · Ulster Unionist Party 2 content, 0 not content · Bishops 0 content, 1 not content · Democratic Unionist Party 1 content, 0 not content · Green Party 0 content, 1 not content

• 5 January 2026Government defeated

  Lord Callanan moved amendment 47, after clause 5, to insert the new clause Cost of the Treaty.

  Peers' vote324 peers

  Content · 194Not content · 130

  Conservative 139 content, 0 not content · Labour 0 content, 120 not content · Liberal Democrat 37 content, 0 not content · Crossbench 8 content, 7 not content · Non-affiliated 4 content, 1 not content · Democratic Unionist Party 4 content, 0 not content · Ulster Unionist Party 2 content, 0 not content · Bishops 0 content, 1 not content · Green Party 0 content, 1 not content

• 5 January 2026Government won

  Baroness Foster of Aghadrumsee moved amendment 32, after clause 1, to insert the new clause Referendum.

  Peers' vote346 peers

  Content · 168Not content · 178

  Conservative 150 content, 0 not content · Labour 0 content, 123 not content · Liberal Democrat 0 content, 43 not content · Crossbench 7 content, 11 not content · Democratic Unionist Party 4 content, 0 not content · Non-affiliated 4 content, 0 not content · Ulster Unionist Party 2 content, 0 not content · Bishops 1 content, 0 not content · Green Party 0 content, 1 not content

• 5 January 2026Government defeated

  Lord Purvis of Tweed moved amendment 19, in clause 1, page 1, line 7, after the words last inserted to insert “, subject to subsection (2A). (2A) Sections 2 to 4 of this Act come into force only when the conditions in section (Referendum (No. 2)) have been met.”

  Peers' vote341 peers

  Content · 210Not content · 131

  Conservative 149 content, 0 not content · Labour 0 content, 121 not content · Liberal Democrat 42 content, 0 not content · Crossbench 8 content, 9 not content · Democratic Unionist Party 4 content, 0 not content · Non-affiliated 4 content, 0 not content · Ulster Unionist Party 2 content, 0 not content · Bishops 1 content, 0 not content · Green Party 0 content, 1 not content

Lords votes last updated 18 October 2026. Source: UK Parliament Lords Votes API.

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Bill passage