PE change-fees?

If I wanted to change a K, S or W PE ticket to (say) fly back a couple of days later or via a different airport, how much would the ticket change charge/fee be?

I realise that this would be totally dependent on availability of a seat on the new leg etc...

Thanks.

[Neil]

The change fee is £90 - plus then any fare difference between the price you paid for your K fare and the new S or W fare price.

Plus any difference in taxes too, such as if the YQ fuel surcharge has gone up you will have to pay that difference too.

If it was a PE sale fare then the change fee will be £120 instead of £90.

Ed

But if you have a W there's no change fee for a change of date that is.