I don't think I'm allowed to cut and paste the contents on here, due to copyright issues.
You can follow the link which also has a PDF download to read offline.
Hope you find it useful.
The UK Government has put all those of us in the Extremely Clinically Vulnerable category on a three-month Vitamin D trial. I received mine in the post. I've been on it for over a month but it's hard to tell what it does as I've also been undergoing other treatments.