You are registered in the UK, but you are currently signed in to the US ebay.com site.
You may want to sign out here and sign back in to the UK site:
https://www.ebay.co.uk/
Clear your ebay.com cookies from your browser. If you use your browser's autocomplete function to navigate, clear your browser history so you are not sent back to the US site. Make sure you are not using an ebay.com bookmark or following a US link to reach the site.
If you are still having problems on ebay.co.uk, try posting on the UK discussion boards:
https://community.ebay.co.uk/t5/Discussion/ct-p/13
Be sure to include some details of what browser or app you are using, and what page you are on or what you are doing when you experience problems, and whether the problems continue if you restart your device or try another browser.
