Have just flown J on BA ticket to LHR and used the arrival lounge. Excellent as I arrived 5am and could have a shower and shirt ironed before work meeting at 0830 downtown. Impressed. Have never used it when I flew on QF J to LHR. Can someone advise me if I can use the arrival lounge if flying QF or only with BA and whether OWE allows access or only if J class?