Complex sentence: Sweden as well as England, Wales, and Scotland, in the UK, now have a single, and only, region wide police force Police Scotland, as well as Northern Ireland whose regional, and only, police are the Police Service of Northern Ireland.
Split into simpler sentences: Sweden as well as England, Wales, and Scotland, in the UK, now have a single, and only, region wide police force Police Scotland. As well Northern Ireland has a regional, and only, police force the Police Service of Northern Ireland.