If you are trying to sign-in without an NHS login, because you already have a Classic Login, simply use the Classic login fields detailed below:
We recently enabled new users to register with an NHS login.
Once logged in, existing users who use our Classic Login method have the option to migrate to an NHS login.
We hope that most of our customers will opt to migrate to using the NHS login feature as soon as possible.
NHS login lets you access a variety of digital health and care websites and apps with just one email address and password.
If you haven't migrated to NHS login yet, simply sign in as above as normal, then click on "Register using NHS login" (see above) and follow the on-screen instructions
At the moment this migration option is optional.
For more information on NHS login, visit https://help.login.nhs.uk/setupnhslogin/#what-is-nhs-login%3F