Good news, and bad news.
Ordered an SKF VBKA 6531 bearing, and got it installed at a local garage (decided it was too much of a faff to do myself considering I don't have a press tool).
Picked up the car yesterday, and the issue is sorted, car glides along nice and quietly as it did before.... however took it on a longer drive this morning and after a few miles I had an "ABS / DSTC service required" warning message
I know the hub/bearing assembly includes an ABS ring so I guess either the garage installed it incorrectly and damaged the ABS ring, or the part I ordered was defective (not sure how I'd prove it either way?)...
I'll ring the garage in the morning and see what they say, but what a pain in the a**e.... feel like it's been one thing after another with this car, and also reminds me why I try and do as much work I can myself... cheaper and the job gets done right.
I guess I'm going to end up having to fork out for a whole new hub (£80) and labour of basically getting the job done again elsewhere.