Johnson's approach has nothing to do with this topic. Only very shortly after ceding the Chagos Is. and effectively abandoning the Chagossian people, Starmer has set a precedent in the eyes of Spain and Argentina, so now faces sovereign claims with both, over Gibraltar and The Falklands respectively. Starmer's weakness will cause ever more problems, which will probably be aggravated by the EU (at least in the case of Gib) for its advantage. Both Spain and Argentina would love to see this weakness result in complete wins for both of them.
Another useless nitwit at the end of the long list of recent useless PM nitwits.