Thanks for the brilliant explaination TGFlyergirl...yes this is great news for me. Nice to be able to book into A or F bucket without actually paying $$$ full fare for it! I realise that atm it probably costs 3 times as much to book in first class compared to U class, but I feel that in time, P inventory will become more available. This is definitely a welcome change for me as I always have to get at least 4 seats for the family.