In response The Stonemason wonders:
As he spoke only of Scotland, does this mean Cochrane understands Wales to be a constituent part of England?
How many others believe as Cochrane?
If Mr Cochrane understands Wales to be part of England he is legally correct.
Wales is not a constituent part of the Union. The Union is the United Kingdom of England Scotland and Ireland (now just Northern Ireland). Wales is a part of the Union by virtue of being annexed and incorporated into the realm of England.
Those opposed to Scottish and Irish Nationalism are, quite rightly, called Unionists. Those who are opposed to Welsh Nationalism, if one wants to be pedantic, are not Unionists but are something along the lines of Annexational Incorporationalists.