CIS2 Authentication Release 11.01.01
Release date 15 December 2025 (subject to final approval)
Allowing smartcard authentication after Chromium browser updates
Chromium based browsers have introduced a new browser permissions prompt.
What this means for you
If you are authenticating with a smartcard, you will need to select 'Allow'.

We are seeing an increased number of calls to the service desk related to:
- Error 400_645
- am.nhsidentity.spineservices.nhs.uk accept/block prompt
These errors are typically related to the latest Chromium browser updates and can block smartcard functionality.
Read guidance for allowing smartcard functionality at an enterprise level.
Why we are doing this
We are seeing an increased number of calls into the service desk as the default option is to block. In order to improve the user experience, we've updated our instructions so they more clearly point towards the correct steps.
Last edited: 12 December 2025 12:31 pm