My understanding is that WPL's +10% strategic holding is a block...

My understanding is that WPL's +10% strategic holding is a block to any outside t/o - ie without the approval of WPL.
Some of the more learned HDR posters (eg Hardmano etc) may clarify this - otherwise any broker could explain.
WPL would be the likely t/o contender but why - they have blocking stake + a good working relationship with HDR. Probably happy for HDR to do the initial deals / hack work & buy in (farmin) later as per the Mauritania model.
Hope this helps,
Snoball.