I am looking to change the date of the return leg of a cash booking I have recently made. The original booking was for Euro Traveller outbound and Club Europe inbound.

In MMB I have clicked through the change booking screen for my CE inbound flight and selected the date I wish to change it to. I am being charged the £1 fair difference but also a £100 change fee. I was under the assumption that I would only be charged a fee for the sector being changed rather than both sectors. So £51 in total.

I found the following under the 'Change my booking' drop down.

"Time/date changes permitted at any time before each flight departure for a change fee of £50 or an upgrade fee of £50 plus any difference in fare. All sectors may be repriced. Changes subject to availability. Fees apply per ticket"

I know it says all sectors may be repriced but I'm only changing 1 sector. Is the £100 fee correct?