As you can see from the Government website (Eye conditions and driving), Keratoconus has been removed from the list of notifiable conditons.
This change was made after consultation with the Association of Optometrists. You can read their announcement – Here
However, it remains sensible for drivers with KC to let their insurance company know they have keratoconus or risk a legitimate claim being disallowed.
For further background, this issue was featured on page 10 of our Spring 2023 Newsletter.