Having just looked at the link: 2006
https://www.online-coordination.com...tabid=AvailHour, frankly what's shown is a load of rubbish (unless I'm just plain stupid!!) because for example, for the period 27 March to 02 April 2006, the 0700 to 0800 hour is certainly 'green' but appears to offer 20 arrival slots and 17 departure slots i.e. a total of 37 movements - and this excluding corporate movements!!!
I don't think somehow, that this is a true reflection of the forward planned runway slot situation at LTN for 2006.
But please correct my interpretation if I'm wrong!!