Originally Posted by
jridge
For the paid ticket, changes are governed by the fare rules. An "N" fare from LHR-PUJ currently says that a change is 100 GBP + fare difference, with the 100 GBP waived for schedule change or death. If you buy a cheap ticket, it will come with the most restrictive rules regarding changes - that's a risk you took.
Since OP is dealing with a schedule change, shouldn't the change fee be waived?