The QE design includes ducts for traps, space for arrester gear and space for steam plant should it be required. The as built design will have a large port sponson supporting an angled deck, although its not so apparent with centre-line deck markings.
Goto Video 2 on this link, about a quarter of the way through you'll see the CTOL gear going down before the flight deck is covered over:
Queen Elizabeth Class : Future Ships : Surface Fleet : Operations and Support : Royal Navy