The NHS Covid Pass
The Covid Pass lets you share your Covid-19 vaccination records or Covid-19 test status. You may be required to show your Covid Pass at events and venues that have chosen to use this service or for travel abroad. The Covid Pass is available on the NHS app.
You can download it on your phone but if you are not able to do that, you can also request a Covid Pass letter in the post on the NHS website or by calling 119.