At this point the islands are too British to even fight over. As we all have seen, the Brits are literally willing to defend them at all costs, so they're not going to give them up. It is like a China-Taiwan sort of thing. You can claim something all you want, doesn't mean it's yours.
Say I look over at my roomate's chair. I claim it as my own, and constantly assert that, but never actually take it from him, does it make it mine? No, it leaves me looking like a fool and without the chair.