If I am exchanging my tickets in Europe will I be charged any additional fees?

If I am exchanging my tickets in Europe will I be charged any additional fees?

If you purchased an exchangeable ticket, you will not be charged a fee in France or Belgium. Tickets exchanged in Britain will be assessed of £3 fee for credit card transactions of £30.00 or more. Travelers have the option to use debit cards or cash at no additional cost.