Buddy refuelers? Doing things like that is a precaution. Just like plane guard destroyers or copters ready to pluck pilots from the sea. You can certainly land planes without buddy refuelers.
Will vertical landing planes be able to make low visibility approaches and landings?
Sorry. The QE will be a nice little carrier for a few stovl planes and copters. But by no means would it be a fleet carrier in anyone's book.
Just seems a shame for the country that invented the angled flight deck and steam catapults should settle for a nice little boat.