As things stand, what I would make of it is that BA have somehow sold out on a popular route in the middle of the main school holiday. The sales buckets are zero'd out. Now other possibilities exist. For example it is currently down as a ten-a-row 777 in WT, which would give you a good IFE. But if they were looking to swap aircraft then it's not unusual for them to zero sales while they reconfigure the seated passengers. That's just one of many possible explanations, but I think my first hunch is the more likely.

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