Nuclear Subs , Nuclear power will be next , well done Australia , the end to green energy, page-58

It's $100B pissed up the wall that is the HallMark of the LNP.

Apparently the French contract contains mile stones. When a milestone is reached a decision can be made to continue or withdraw. Compensation will be decided at a later stage.

Some work will continue at the SA Osborne site to finish parts of the partially built structures while other constrution of other parts will be halted pending results of the scoping study.
I think the US, UK deal is likely to cost more than the present one.

According to the Government this deal became possible because the latest version of the US nuclear propulsion unit is fueled for life.
We will get the subs a couple of years later than when the French ones were due.