If you cannot upgrade your operating system or find an older version of the app that works with your current operating system, you should still be able to use a browser to go to ebay.co.uk instead.
If eBay browser links are opening in the Android version of the app automatically, you can disable that by going to your device Settings: Apps: eBay: Open by default: Opens supported links and choosing "Don't open in the app". iOS users can tap and hold an eBay browser link and choose "Don't open in the app".
