G is still the bottom of the barrel, although as it tends to be used for group fares there could be special conditions attached, allowing more flexibility.

All buckets are semi-flex if bought with a checked bag, allowing free same-day changes if the change is made at least an hour before departure of the earlier flight (whether changing to or from) and of course if there is availability.

The question is whether that applies to flights booked as holidays with BA or only to flight-only bookings.