It is always a pleasure to follow the hon. Member for Inverclyde (Ronnie Cowan), even though I disagree with the points that he made.
This is an interesting debate for me, because when I was growing up my father worked in the Devonport dockyard on the refits of the Vanguard-class submarines. I remember the campaign back in the early 1990s to get that refit work done in Plymouth rather than having it end up in Rosyth, and we can still see the hole that exists there.