Thanks mate !
Very satisfying as it is now done and I am thawing out ! But... one of the flexi brake hoses is leaking under braking which I found when bleeding and will need to be replaced asap. Can't use the ones of my old beam as had to cut them due to not being able to undo the nuts.
On the upside though I now have a set of Mk3 rear calipers and a rear beam to sell, albeit with a scored driver side stub axle !
I'll post in the for sale section