Ann: Zenith Releases Half-Year Results, page-17

Not sure if these questions have been asked or answered, but:

Has any explanation been given for why Gavin Great left the company (whilst owning approximately 18.5 million shares)?

Is the expectation that he will sell these shares on market?

What happens to the energy plant that ZEN have built if one of the mining / other sites closes down? Is this plant able to be taken down and "reused" - or does the value of it need to be written off as technology has "moved on"?

The recent financials for this company were exceptional, therefore I am a little puzzled at the current share price / low PE ratio?

Thanks!!