I remeber seeing this report many years ago - and I remember commenting at the time that althought the report states that both Hare's Foot Clover and Soapwort have been lost from the site - they haven't. I saw both last year (and previous years) but you have to believe they are there to find them as they are getting swamped by other stuff.
It would be great to see a Brown Argus butterfly or a bee orchid though!