I am intrigued by statements like that of Julia Langdon (“Farewell to old certainties”,2 May): “… the primary victims would be those Scottish Labour MPs who had for so long taken the electorate – and their own election – for granted.” I’ve seen this kind of statement repeated quite often but I would be glad of evidence to support it.  I note there is a large aircraft carrier being built at Rosyth Dockyard in Fife and another one will fo