Watching George Osborne chatting about RN options on Andrew Marr earlier, I got the impression that no final decision has yet been made on what's going to be flying off 'the things' (nice to know he has grasped the more difficult technical terms). Either that, or he has forgotten what he agreed.
I got the impression of the exact opposite. I thought he said they have a [cunning] plan for the aircraft to fly off the carriers and all would be revealed this week, and confirmed that they will indeed be aircraft carriers. Although he did blast the last government for not knowing which type to use, which isn't strictly true given that a proportion of the UK's investment into the JSF programme had been going into the F-35B.