Politics in the British Isles converse of unionism, nationalism, is also an important factor for politics in the Isles. Nationalism can take the form of Welsh nationalism, Cornish nationalism, English nationalism, Irish nationalism, Scottish nationalism, Ulster nationalism or independence movements in the Isle of Man or Channel Islands. Identity is intertwined with politics, especially in the case of nationalism and independence movements. Details on identity formation in the British Isles can be found at Britishness, Scottish identity, Irish people. Pan-Celticism is also a movement which is present in several of the countries which have a Celtic heritage. There are no major political parties that are
Introduced species of the British Isles damage. Case studies of impact examples can be found at the Non-native Species Secretariat website. Information on control methods for aquatic species can be found at the GB Non-native Species Secretariat website. One notable example of a species introduced to the British Isles is the grey squirrel from North America, which out-competes the smaller native red squirrel, as well as carrying a virus that is fatal to the reds. The cost of attempting eradication was reported in 2010 to be £14 million. These attempts have been deemed unsuccessful and priority is now being given to preserving the remaining red squirrel