Diego Garcia Military Base and British Indian Ocean Territory Bill: stages, votes and documents
The Diego Garcia Military Base and British Indian Ocean Territory Bill was introduced in the House of Commons on 15 July 2025. Its latest stage in the Bills API is Consideration of Commons amendments and / or reasons in the House of Lords. MPs divided on it 10 times between 9 September 2025 and 20 January 2026; the narrowest margin was 144 (Clause 2 stand part).
Stages taken place
12
Commons divisions
10
Documents listed
14
Latest stage
Consideration of Commons amendments and / or reasons
What the bill is for
The long title reads:
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.
Sponsors
- Mr David Lammy (Labour, Commons), Foreign, Commonwealth and Development Office
- Baroness Chapman of Darlington (Labour, Lords), Foreign, Commonwealth and Development Office
Stages
| Stage | House | Sittings |
|---|---|---|
| 1st reading | Commons | 15 July 2025 |
| 2nd reading | Commons | 9 September 2025 |
| Programme motion | Commons | 9 September 2025 |
| Committee of the whole House | Commons | 20 October 2025 |
| 3rd reading | Commons | 20 October 2025 |
| 1st reading | Lords | 21 October 2025 |
| 2nd reading | Lords | 4 November 2025 |
| Committee stage | Lords | 18 November 2025, 25 November 2025 |
| Report stage | Lords | 5 January 2026 |
| 3rd reading | Lords | 12 January 2026 |
| Programme motion | Commons | 20 January 2026 |
| Consideration of Lords amendments | Commons | 20 January 2026 |
| Consideration of Commons amendments and / or reasons | Lords | No date given (scheduled) |
Commons divisions on this bill
Documents
Bill
- Bill 285 2024-25 (as introduced) 15 July 2025
- 5901139.pdf · 5901139.html · 5901139.xml 21 October 2025
- 5901158.pdf · 5901158.html · 5901158.xml 5 January 2026
- Bill 364 2024-26 (Lords Amendments) 13 January 2026
- 5901163.pdf 21 January 2026
Explanatory Notes
- Bill 285 EN 2024-25 15 July 2025
- HL Bill 139 Explanatory Notes · 5901139-EN.pdf 21 October 2025
- Bill 364 EN 2024-26 (Lords Amendments) 19 January 2026
Delegated Powers Memorandum
- Delegated Powers Memorandum from the Foreign, Commonwealth and Development Office 15 July 2025
- DiegoGarciaBillDPM.pdf 22 October 2025
Briefing papers
- Diego Garcia Military Base and British Indian Ocean Territory Bill 2024-25 5 September 2025
- 2025 treaty on the British Indian Ocean Territory/Chagos Archipelago 8 September 2025
- Diego Garcia Military Base and British Indian Ocean Territory Bill 30 October 2025
- Diego Garcia Military Base and British Indian Ocean Territory Bill: Consideration of Lords amendments 19 January 2026
Official record
Sources
| Record | Read | SHA-256 |
|---|---|---|
| Bills API: bill | 27 October 2026 | c57dbc6cd17eccb6… |
| Bills API: stages | 27 October 2026 | 70477791b3a135c7… |
| Bills API: publications | 15 October 2026 | 4ec7b5091196f403… |