Claire turns the box of chocolates sideways, sits back with her hands at the edge of the desk, then as she leans forward to get a chocolate her arms disappear back to the desk's edge and the box has changed direction.
William is shown giving his youth soccer team a pep talk with minutes to go in their championship game. But soccer does not have timeouts, so he would have no opportunity to do this.
Upon when the scenes of aircraft, they're using Airbus A380-800 from New York-JFK to London-LHR for the landing. British Airways doesn't fly to New York-JFK using Airbus A380-800s, as Terminal 7 doesn't have gates for Airbus A380s.