Originally Posted by
absoluy
The £4,000 flight is obviously overpriced (since it's world traveller, plus leaving the next/previous day brings the price back down to a far more reasonable £200).
£4,000 is unlikely to be WT - even full Y fares are not that high. Even WT+ W fares to US west coast destination are only just over £2,000. I'm surprised to see that even WT+ W fares to Sydney for next week are under £3,000...
Note that the results page on ba.com now lists the lowest available higher class if you ask for economy and that is unavailable.