Anthony H. Birch 
Political Integration and Disintegration in the British Isles [PDF ebook] 

Originally published in 1977, this book provided the first analysis of the processes of political integration and devolution within the British Isles, taking account of the social, economic and cultural factors involved as well as the unique character of the political system, together with the growth of Scottish and Welsh nationalism. The book contains both an analysis of the nationalist movements of Ireland, Ulster, Scotland and Wales and a critical assessment of the way British central Governments have reacted to these movements.