No we will have no organic air defence capability till the JSF arrives, but you could argue that we haven't had that since the Sea Harrier was decommissioned the better part of ten years ago. The Harrier's that they have just decommissioned were part of Joint Force Harrier which was a combined RN/RAF unit, but they were all GR7's and GR9's which are the ground attack variant. They could carry air to air missiles but in a fight against a dedicated air superiority fighter, they wouldn't last long.
But we've just changed our order, we no longer want the VSTOL version of the JSF but the conventional catapult launched version, which in my view, is the correct decision but should have been taken much earlier. The problem is, that to launch these jets you need steam catapults. On a diesel engine powered Aircraft Carrier like the ones we are building, where does the steam come from? It was easy on the Carriers of old as they were steam ships and well, the Nuclear Carriers are still essentially steam ships!
So we have signed up to the latest Electromagnetic Catapult project which is state-of-the-art tech, but so far no one has got it to work! Soooo even if we do get our JSf's in ten years, will the Carriers be ready to receive them?
Watch this space.