Decided to bite the bullet and replace one of these today as wheel touching arch occasionally.
I previously replaced both about 4 years ago when I had the rear subframe off for a clean up. This time I did it in situ. (Drivers side for the record)

Undone bolt and disconnected shock and anti roll bar and removed spring.
Swing arm plopped down easy and I propped it on wheel..was able to swing it around a fair bit without stressing the still connected handbrake cable & brake line etc.

The internals had rotted to little more than dust. At first I couldn't recognise the races were actually still in situ as everything was a mess. Totally dried out bearings destroyed etc.
Had a bit of a job getting the races out...ended up needing a blow torch for one of them. Anyway drifted them out and cleaned up the swing arm. One side of arm is a bit damaged and new rubber seal is no longer filling the gap...however it will gave to do for now as off to France with multi in a few weeks.

I made a complete balls of reassembly.
I used an old race as a drift for both new races...perfect nice and easy(installed plastic sleeve first)

Next the bearings onto metal collar, I should have pressed metal collar into one bearing before trying to put it all together(I was using threaded bar and washers to compress the whole lot)
I've no idea how I forgot to do it this way...

I also managed to select washers to drive the bearings onto the metal collar that were a perfect interference fit onto the collar...once the bearings had gotten on so followed the washers...took me a while to spot what had happened and getter off again was a nightmare!
When I got them off they had actually damaged the faces of the collar which made getting the little metal pieces on that hold the seals a total nightmare. I had to resort to using my rather large electric impact gun and that was a struggle even.
In hindsight I don't think I needed washers at all. It was a royal f up by me.
Anyway got it all back together but my lapse in concentration cost me a few hours and a couple of times I genuinely thought it wouldn't be back on the road anytime soon.

Please learn from this!!!
Now...timing belt has to be done this week...
Marty.

I feel your pain Marty. Just for the benefit of others, can you remember what make the last set of bearings were, if only so that everyone can avoid them!

I won't be surprised if you say Birth.....

The last set were firstline.... the set I just installed are frs, firstline stuff normally good, in fairness they probably had 50k on them and the design allows the grease to be washed out so maybe not the bearings fault.
My tips though for others...
1. Install one bearing onto metal collar prior to installing in car(that was fair stupid of me I even remember doing it the right way four years ago)
2. Make sure whatever you use to drift the bearings onto the collar will actually fit over the collar or you'll be in the same rut I was.

On the plus side there was actually plenty of room to drop the swing arm and turn it almost 90 degrees to work on.

Last time I did them I had the whole lot off the car and it was much easier(but your into replacing seized brake lines etc with that so worth avoiding in fairness)

Marty.

Timing belt went without a hitch...even managed to get a 1835 aux belt on it(that I failed to get on previously)..3 hours and all tidied up.