I probably would have answered 285 tons instead of pounds and 285,000Lbs was 129,276 Kgs
BA do not use lbs. in its calculations for fuel or performance, only kgs. and, therefore, tonnes.
285 tonnes is a BA 747-400's MLW.
Terrific isn't it that unmanned transport, in his or her haste to publicise the Times article, cannot be bothered to read the entire thread and therefore repeats the post 8 posts above.