Have had this problem now for 4 days, using Chrome on Android, rebooted, cleared cache, signed out and in several times. Spoke to eBay advisor for around 20 minutes who couldn't sort problem and has reffered it to tech but not heard anything from them.
I did find a work around which may help someone else having this problem, log in to the .com site, load basket which in my case was empty, then alter the address bar by deleting .com replacing it with .co.uk and my basket opens, not ideal but at least I can access it until eBay sort it
