Many thanks for your advice and such a prompt reply.
I see that you're recommending a complete spider kit as opposed to just the bearings, is this because of the severe vertical movement I notice? Does this indicate complete bearing failure and more?
One other thing, there's much mention of the brass bush which could also be damaged, is this included with the spider? Or perhaps it's integral to the drum?
Thanks also for the tub seal link and tip
Total cost seems around £35 + delivery so I'm not sure it's worth the physical torture (I'm assuming this is hammering the bearings off and on?)