There appears to be an issue getting an accurate seat map for the World Traveller Plus cabin on BA's A380, e.g. the LAX-LHR BA268 on 19 Oct.
I have had someone check the seat map on BA's Manage My Booking and it displays 21 free seats. KVStool shows 9:
[KVS Availability Tool 7.2.4/Diamond - Seat Map: 19 Oct 2013/BA 268/LAX-LHR/EQV/W-Premium Economy]
Code:
A B | D E F | J K
60 - + - [U]
61 - - - - - + - [U]
62 - - - + - - - [U]
63 - - - - - - - [U]
64 - - - + - - - [U]
65 + - - - - - - [U]
66 - - - + - - - [U]
67 + - - + - - - [U]
68 - + - [U]
[+] Available [W] Wing [L] Lavatory
[-] Unavailable [E] Exit Row [U] Upper Deck
[P] Preferred [|] Aisle
EF has the correct map (and this apparently matches with BA.com)
FWIW, all the (aisle) seats which are available but "handicap accessible" (according to EF) are shown as unavailable on KVStool.