Diego Garcia Military Base and British Indian Ocean Territory Bill

Commons bill Government Bill 2025-26

Consideration Of Commons Amendments And / Or Reasons · Lords
Sponsor
Mr David Lammy (Labour)
+ 1 co-sponsor
  • Baroness Chapman of Darlington (Labour)
Introduced
15 July 2025
Last activity
20 January 2026
About this bill

A Bill to give effect to, and make provision in connection with, an agreement between the governments of the United Kingdom and the Republic of Mauritius concerning the Chagos Archipelago.

Parliamentary stages

Stages shown in blue link to the debate transcript. Not sure what these stages mean? How Parliament makes laws →

Commons
First reading 15 Jul 2025
Second reading 9 Sep 2025
Programme motion 9 Sep 2025
Third reading 20 Oct 2025
Programme motion 20 Jan 2026
Lords
First reading 21 Oct 2025
Second reading 4 Nov 2025
Committee stage 18 Nov 2025
Report stage 5 Jan 2026
Third reading 12 Jan 2026
Consideration Of Commons Amendments And / Or Reasons
Final stages

Not yet reached

Parliamentary information from bills.parliament.uk ↗, licensed under the Open Parliament Licence v3.0. Explanatory Notes extracts are verbatim from Parliament's published documents.

What this bill is about

From the Explanatory Notes (October 2025):

1 The Diego Garcia Military Base and British Indian Ocean Territory Bill makes provision to implement, and makes other provision as a result of, the Treaty between the Government of the Republic of Mauritius and the Government of the United Kingdom of Great Britain and Northern Ireland concerning the Chagos Archipelago including Diego Garcia ("the Treaty"), signed 22 May 2025. 2 The Bill terminates UK sovereignty over the British Indian Ocean Territory ("BIOT") in domestic law. In addition, the Bill amends legislation on nationality to reflect that BIOT will no longer exist as a British overs…
Read the full Explanatory Notes ↗