Action Fraud is reporting that fake NHS emails are circulating offering users a "digital passport" that “proves you have been vaccinated against COVID-19”. These emails are fake, and the links within them lead to genuine-looking websites that steal your personal and financial information.

Recording staff vaccination data

Firstly, a couple of links as reference...though they don't really tell you the answer - especially the second one which doesn't seem to have been updated post-August 16th:

The Government has provided some guidance on the avoidance of disinformation online.

https://sharechecklist.gov.uk/

What is disinformation?

Disinformation is the deliberate creation or dissemination of false and/or manipulated information