当新的价格比原来的价格低，英航将收取更改费用，但不会退款其中的价差。
When the new itinerary results in a higher fare, the difference will be collected, and the change fee will be applied.
当费用更改是对贵方有利，或该变更出于我方无法控制的外部环境条件，我方可自行更改费用而不需予以通知。
We may vary the Charges without notice when the change is to your advantage or the grounds for changes are due to external circumstances beyond our control.
提前8周以上买机票似乎是个绝佳的决定，但是这意味着消费者得冒险为更改飞行计划支付费用。
If buying tickets more than eight weeks ahead look like the best option, it could, however, mean that the consumer risks having to pay to alter booking if the plans change.
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