Yeah but CDG has 4 runways, AMS has lots (though they only use two), FRA has 3, etc etc, and none of them are as close to saturation point as LHR. DL may only want 11 slots per day, but if NW want 11, CO want 11 then thats 33 slots that have to come from somewhere, and they're all wanted at the busiest time of the day. The only way you can get them is to take them from BA and AA, and is that really fair?