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The e-mails were genuine and eventually after talking to Customer Service I now have access again.
Apparently, my account had been hacked and a "spoof" listing for a 1.5 ton bobcat mini digger starting price £1100.00 had been placed on my seller account. It was this listing that caused my account to be disabled.
I have a washer program running at the front of my e-mails so I can see all content without putting them into my inbox, or clicking on links. I can reject/delete/bounce as necessary.
I hope this information is helpful to anyone who might encounter a similar problem with their e-bay account.