Mr. Barry Lowry:

The process for the verifier app has two functions. One is to prove that what is in the QR code is the same as what is in the certificate so that if somebody tried to forge it, it would be impossible. The other is to try to provide a level of assurance that the proof the person is travelling on is appropriate for the country he or she is heading for. If it all works correctly - and the signs are it will - if I was travelling to Belgium, for example, and using an antigen test and Belgium did not accept that test, they will know at the airport and be able to tell me that I may well have to quarantine when I go to Belgium. That is the way the EU hopes it will work. It has what they call business rules and identity rules. Countries might change their rules at any time, which is why the Minister of State said in his opening statement that every six hours we will download new information from the EU server. That will be updated to the apps on phones and we will know what the current rules are.