LONDON (AP) — A British court said Thursday that the U.K. can transfer sovereignty over the contested and strategically located Chagos Islands to Mauritius, overturning a block that was imposed hours before the agreement was due to be signed.

Britain signed a multi-billion dollar deal on the future of the Chagos Islands with Mauritius after a last-gasp injunction was overturned, securing itself a lease for the U.S.-UK Diego Garcia air base for the next century.

The islands, named after a Spanish navigator, have a basically symbolic British presence. The United Kingdom hands over the Chagos archipelago (and the massive US base on Diego Garcia island) to Mauritius (and to the Chinese fishing fleet).

A British court on Thursday paved the way for a government deal on returning the remote Chagos Islands to Mauritius, lifting a temporary ban which had forced an 11th-hour halt to an accord being signed .

Mauritius and Russia have agreed to strengthen ties, amid fears that the UK was too hasty in deciding to hand over the Chagos Islands.