Deep Sea Mining in International Waters

Debate between Lord Randall of Uxbridge and Lord Collins of Highbury

Monday 30th June 2025 Lords Chamber

[Lord Collins of Highbury (Lab)]

My Lords, as a party to the UN Convention on the Law of the Sea, the United Kingdom fully supports the work of the ISA. The UK has been fully engaged in the work of the ISA since it was established, following the entry into force of UNCLOS in 1994. There are strong protections in place against deep sea mining around Diego Garcia. Under the agreement, the United Kingdom has the right to exercise rights and authorities required for the long-term secure and effective operation of the base out to 12 nautical miles and is responsible for environmental protection on Diego Garcia. Additionally, we negotiated a further 12 nautical-mile buffer zone out to 24 nautical miles, in which Mauritius cannot place any maritime installations, sensor structure or artificial island that might be required for subsea mining without UK consent.

[Lord Randall of Uxbridge (Con)]

My Lords, I welcome the Government’s continuing commitment to the moratorium on deep seabed mining. On the wider protection of oceans, when might we ratify the high seas treaty? Will that be done by the end of this year?

[Lord Collins of Highbury (Lab)]

It has been made public that legislation will be introduced by the end of the year to enable the ratification of the BBNJ agreement. That agreement includes processes to ensure better co-ordination and co-operation between international bodies responsible for ocean governance, including the ISA.