NaB - cleared that one up then.
Add to that:
1. We've already got Ocean.. (and we'd be fools not to keep Ark in reserve)
2. Do you want to risk a 65-100kt monster inshore?
3. The UK will be able to have a LPH, LPD, LSD and CV all on the same operation, and all not necessarily being in the same place or hitting the same objective.
Compare that to:
1. One big fat target, with all your air force, all your assault troops, and your first wave logistics coming inshore.