Hi Veronica, The Irish Roots project is for everyone with Irish ancestry and not just those who left Ireland.
The UK project is a fairly new umbrella project. As you say it's sub projects at the moment are England, Scotland, Scottish Clans, Wales and the associated Irish Roots.
All UK countries are divided into Counties. There are numerous categories within all of these. There are also some active sub projects e.g County Cork, Scots in Foreign Service, Scots Abroad ( which will look at how Scotlands commercial trade evolved} We are also linking Commonwealth Countries to our umbrealla page (projects and categories )
We are actively looking to develop the U K project (resources permitting) and would be happy to consider any new sub project you have in mind.