I guess the JV parent company wanted to renegotiate a few...

I guess the JV parent company wanted to renegotiate a few things. Final due diligence 'largely' completed and documentation 'substantially' agreed. Contractual close (JV partner company approval) late March with Financial close (everything coming together) between April - June, possibly April/May as its mentioned early Q2.

'Substantially': The vague term substantially is often used to allow for some minimal deviations after entering into an agreement. In major M&A-transactions, various affiliated contracts will be in an ‘agreed form’ on the signing date, ready to be entered into on the closing date of that transaction.

I would expect we will probably get a string of 'extension' announcements and possibly some battery / Jemalong (Commissioned) announcements while we wait for 'Contractual' and Financial close.