"not to mention the relocation of the IND to Devonport and obviously the refit and maintenance of the carriers somewhere south of the border............"
You'd be lucky - there isn't space at Devonport for the Successor boats and all the infrastructre that goes with them - they were looking at Falmouth a year so so back
And if the carriers need to be dry docked there isn't much capacity left anywhere south of the border unfortunatley