I think Thorpey said that between 13th-17th July there are scheduled to be over 100 coaches of school trips a day and that will continue to rise untill the day before.
I would think it would be more than that,average queue times,SAW- 90minsColossus - 70minsStealth-60-80mins,Nemesis Inferno - 45-70mins.Flats around 45mins each mabye more for Rush and Samurai,Water rides around 20mins.