Which former Royal Navy bases would still matter?

Which former Royal Navy bases, beyond Hong Kong and Singapore, would be useful in a modern global war if Britain had retained them through decolonization?

Malta, Bombay, Durban, Halifax, the Bahamas, and most other former bases would remain useful because they were selected around maritime chokepoints, although retaining them would have been politically difficult.

Malta, Bombay, Durban, Halifax, and the Bahamas are useful examples because Royal Navy bases were usually placed near strategically valuable routes and chokepoints. That geography can preserve military value long after the imperial network that created the bases disappears. Britain still could not realistically have retained them without confronting the sovereignty claims and politics of decolonization.