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covid verifier appThe NHS COVID Pass lets you share your coronavirus (COVID-19) vaccination records or test COVID-19 status in a secure way. It allows you to show others the details of your COVID-19 vaccine (or vaccines) when travelling abroad to some countries or territories. From Monday 19 July, you may be asked to demonstrate your COVID-19 status at places that use the service in England as a condition of entry to a venue or event. The NHS COVID Pass also allows individuals to demonstrate their COVID-19 status.

International travel - You can show the vaccination records contained within your NHS COVID Pass as proof of your COVID-19 status when travelling abroad. In addition to your NHS COVID Pass, you will need to follow additional rules when travelling abroad.

Read an overview of all the things you need to do to travel abroad from England

You should check that the name on your passport matches how it is displayed by NHS COVID Pass at least 2 weeks before you travel. If the names are different, contact your GP practice to have your details updated.

The government is working with the devolved administrations to ensure everyone in the UK is able to show their COVID-19 status.

If you have not been fully vaccinated, you should continue to follow the entry requirements of the country you are travelling to, such as proof of a negative COVID-19 test on arrival. You should carefully research the requirements of your destination country before travelling.

Further details on entry requirements can be found on the GOV.UK foreign travel advice pages and on the websites of your destination country.

See advice about travelling abroad from England during the pandemic

Domestic use - The government has recently announced that businesses in England can use the NHS COVID Pass. Some events and venues may choose to ask for the NHS COVID Pass. The government will work with organisations where people are likely to be in close proximity to others outside their household to encourage the use of this. Use of the NHS COVID Pass is voluntary for individual organisations. However, we encourage the use of the NHS COVID Pass in facilities or events where people are likely to be in close proximity to a large number of people from other households for a sustained period of time.

This is likely to include settings that have the following characteristics:

  • crowded indoor settings such as nightclubs and music venues
  • large unstructured outdoor events such as business events and festivals
  • very large structured events such as business events, music and spectator sport events

Two of the team behind the development of the NHS COVID Pass - Michael Measures, Technical Director and Philippa-Rose Hodgson, Product Director, introduce the code behind the new NHS COVID Pass Verifier App, which NHSX has just open sourced under a permissive MIT free software license. The app can be used to scan and verify one or more 2D barcodes that adhere to the EU Digital Covid Certificate and read the display the data held within an individual’s NHS COVID Pass. It does not store or transmit any personal data during this process.

How can I find out more about the NHS COVID Pass?  Find out more about demonstrating your COVID-19 status.

How can I find out more about the NHS Verifier app? Visit Using the NHS COVID Pass page.

What about the Verifier app design? As outlined above the COVID Pass Verifier app has been designed to scan 2D Barcodes in line with the EU Digital Covid Certificate standard (formally known as previously known as the EU Digital Green Certificates). There is a rich online set of developer resources available including:

What is meant by "Open Source"? The term "open source" refers to something people can modify and share because its design is publicly accessible.  All code is made available as Free and Open Source Software.  It is released under the permissive MIT License - this allows you to copy and distribute the code for your own use.

Where is the repository located?  There is one main repository for the app on GitHub. From this repository, the app can be built for both android and iOS devices.

What information is recorded in the app?  The app scans and verifies the 2D barcode within an individual’s NHS COVID Pass. It does not store personal data, and at no point during the scanning process is personal or health data, held by, shared by or retained on the scanning device.  We will be using Azure App Insights to collect GDPR compliant metric data. This is designed to provide greater insight into the live operations of the app and allow us to understand how it is being used. Using this data can make useful observations such as error frequencies, request frequencies, service usage and oversight of the general activity. All metrics that are collated are completely anonymised and independent of actual user data, such as test or vaccine results.

How is this aligned to international standards?  After a full review, we chose to develop and build the Verifier app against EU standards. These were considered and selected as they meet both the needs of UK citizens but also bring benefits in international collaboration to facilitate travel. We are also monitoring other international standards as they develop, and will look to iterate the app to align with international standards as they become confirmed.

How can I use analytics?  A self-built app will be able to scan and verify 2D barcodes. However the keys required to successfully submit non personal analytical data have been removed.

How do I give feedback?  We welcome technical feedback from developers and security researchers. Participation in the code development is via GitHub.  We have a Code of Conduct for participants in order to create a safe and welcoming environment for all.  Bug reports and performance improvement suggestions can be made by opening an issue on GitHub. We will review Pull Requests on a case-by-case basis.

Who worked on this?  A wide range of people across the COVID Pass programme worked on the Verifier App. We would like to thank all those involved who generously gave their time and expertise to the development of the app. The power of open source comes from our ability to collaborate with talented people.





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