Just means when holders own 5% (or more) of the shares (ie - voting rights), they have to disclose that fact to the market. Also, for the same reason, if their holding changes (by, I think, more than 1%) - they have to disclose that to the market as well.
So - if Burton or Middlemas (for example) disclosed they had sold (or started selling down) their holding at this stage of the game .... given they are both "insiders" (so to speak) - then yes, we could be forgiven for assuming we are in the "sheet"!!
CXX Price at posting:
24.5¢ Sentiment: Hold Disclosure: Held