Bob- The Lgw fleet are not ex NZ aircraft or ex anything else for that matter. they were originally intended for AZ and when they cancelled we got them (apparently for a good price). so they entered service brand new with us. Also the legroom in Y is standard across our fleet, there is just a bigger Y cabin on these aircraft.
PE is of course a lot nicer and much more private and personal so enjoy your trip to Antigua...
Vast