Ann: Removal from Official List, page-14

Sorry, meant to include this definition of issuer sponsored, I think you're asking for more than that though:

Issuer sponsored shares are issued directly from the company and are maintained by a share registry. They are identified by a Securities Reference Number (SRN) that typically starts with an “I” e.g. I00076272. Broker sponsored shares are issued to you via CHESS and sponsored by a stockbroker.

Gives us the ability to still trade the shares I guess, not that anyone in their right mind would want to buy them...