Indeed, I would like to understand the answer to the above question better, since the only reason I can see is that Mauritius as a colony used to govern the islands, and that seems to have just been a convenience of the French that doesn't strongly justify any current claims of sovereignty. And since the UK were the ones to forcibly evict the Chagossians from the islands, it seems a double-injustice to "return" their land to another sovereign power which is equally at a distance from the islands themselves. Do the Chagossians support this claim by the Mauritian government?