Thanks guys, some good tips. I’ve got a proper puller and it was pretty straightforward - went with a massive bang, just like everyone says! I’ve used a 2 leg puller to pull the bearing and carrier off the shaft…and oh dear, looks like this shaft is toast.
The car was sat for over 20 years and recommissioned by the previous owner. Think the grease solidified and the needle bearings became too friendly with the shaft.
A few of the cups on the UJs were dry and the yoke arms heavily ridged when I stripped those, with solid grease in the yoke meaning new grease could never get to the cups.
I expect I’ll find similar when I strip the other side down, so I’m committed to doing the whole back end now!