I think Monday will be reasonably busy but no where near as busy as the 16th,17th and 18th. Most schools have broken up by now and a lot of people are going on holiday. I can't see the 22nd being too busy to be honest, however I may be wrong. My guess is 40-60 minute queues for most of the day with a ride going up to a maximum of 90 towards the middle of the day!