Mail Online lies: Base has "never before appeared on maps for security reasons." Except on Google Earth since 2005

The location of the Hereford SAS base in Google Street View.

Once more unto the breach: If it is visible from the street, it is not a secret. And security through obscurity does not work, especially if you have the Daily Mail helpfully pointing out where the Secret SAS base is. I'd never gone looking for it before in Street View, but have now.