So you refit them by giving them a lick of paint and sell them in an unsafe condition to some unsuspecting second-user navy? Hardly ethical is it?
But they are not unsafe you argue, in which case you have some way to go before catching your tail?
Looking at OldGrubbers post too, it is patently obvious that someone had to be telling porkies over a 50-year life. Also the suggestion that they would be sold on after 30 years as part of the plan does not sit with the MP for Kirkcaldy seeking assurance that the maintenance contract for the next 60 years would go to Rosyth.