We were supposed to be going on holiday at October half term. Clearly not going to happen to I went on the website to change the flights. It states no charge to change them, so chose new flights all fine, but when I came to the last page it said the cost was £900 i..e. The cost of the flights, it hadn’t taken off the cost of the original flights. Has anyone done this and are they going to charge for the new flights in full?