I feel someone should stick up for the CAA here: the Aviation Data Intelligence unit can supply you with all the data you can eat - for a fee. They have some of the most comprehensive data in the industry.
Adhoc Data Charges | Data, Analysis and Statistics | About the CAA
They can indeed supply load factor by route, carrier, and even aircraft type. I've never more than monthly detail but I'm sure it is available.
Airport Database Fields | Data, Analysis and Statistics | About the CAA
Being a northerner caught somewhere between Leeds and Manchester, I am watching this debate with interest. Using the train is great if you happen to live in Central Leeds but useless otherwise - anyone who has been a victim of Northern Rail won't want to repeat the experience
. I do agree they have to sort out an early southbound flight - but that means basing an aircraft up there with all that entails.