The NHS Covid Pass app has stopped working, potentially leaving thousands of travellers with no means of showing their vaccine status.
The feature, which details the vaccine doses a person was given, is needed by those wishing to travel abroad.
Users reported seeing an error message on Wednesday afternoon on the NHS smartphone app, saying that high demand was “limiting access to the service”.
Responding to the problem, NHS digital said in a statement on Wednesday afternoon: “There are currently issues with accessing the Covid Pass on the NHS App and website. We are investigating the issue and will update as soon as we can.”