What's the law on the Koh I Noor?

Discussing the law on restitution, repatriation and reparations, Felicity Gerry KC and Fahrid Chishty have published an article in the prestigious Eastern Eye on centuries of history, how we should approach disputes over cultural heritage and whether they can lay claim to the Koh I Noor diamond?

You can read more here (page 12) https://www.easterneye.biz/digital/issue1704/