The article is incorrect.
STN is also capable of handling the A380 as they were recently given code F status.
LHR/MAN/LGW/BHX are the A380 capable airports, but there are slight differences in terminology:
LHR/MAN are designated A380 DESTINATION airports whereas up to now, BHX/STN/LGW are classed as A380 DIVERSION airports (as I understand it).
Maybe LGW has had its status changed from diversion to destination?