I wondered up to the multistory today at 09:50 and stayed until 10:10. LLAL talks about maximizing the runway use by doubling passenger numbers yet when I arrived the queue of departing aircraft was 8 and by the time I left it was 10 despite only witnessing one arrival with no aircraft back tracking. The queue extended all the way back to the south stands with aircraft also queuing on Delta. Seen nothing like this before at Luton. Noted there were times when there were delays between departures so maybe the issue was getting the aircraft out of Luton airspace.