Sorry if this is already answered elsewhere, but I’m looking to book a flight onto Tokyo. By these calculations I’ll be earning about 3000-4000 TP, with a slight difference depending on if I fly BA or JAL.

I want to fly JAL, duh.

But If I book on the British Airways website will I earn based on pounds spent or by distance travelled? Do I earn differently if I book on the British Airways website for JAL, or the JAL website, or is it always distance travelled if the aircraft is a JAL one.