Well done Stuart! A lot of hard work, but I'd call that a result! That rad you took out looks proper gone!
I replaced my drive belt and Berkshire Jags got it right 1st time, really, really tight though! Other than the header tank I've not had to do much on the cooling system, although AC needs charging again so need to track down that leak / fault.
Unfortunately I've not had time and opportunity to drive my Jag recently, let alone work on her, hopefully this will be resolved in the weeks to come!
Good write up, well done