If I may jump in on this thread and ask a related question (trying to get my head around this). The same day free of charge changes for CE, is this only on single flight itineraries?

My example being, on my trip later in the year, I booked with a 6ish hour buffer on separate tickets from an incoming CX flight connecting AMS-LHR-GLA. Am I right in understanding that this example would not allow a free same day change?

Thanks

S