Took some time, but at least I updated the map of Ireland and Britain. It´s still a work in progress, but to me it seems sufficient enough now to use it as a basis for upcoming changes in the simulator. The updates of the map include:
added lots of villages and cities of 800AD
swamped large areas in accordance to what the resources said for 800 AD
added the mystic Island "High-Brasil"
added the dominions for 800 AD
Changed to an 6-miles-hex map
Added ruins where Hadrian´s-Wall stood
Added maps showing the: - civilisation-grade in accordance of population - dominions