>>272の元ネタはこれらしいな。
フランス側から30%のコスト増と3年の期間延長要求があったのは間違いなさそう。

Christopher Pyne denies reports $50 billion submarine project faces cost and time blowouts
By defence reporter Andrew Greene
Updated Wed at 6:31pm
https://www.abc.net.au/news/2018-12-05/defence-project-submarines-serious-discrepancies-emerging/10584230

> The sources confirmed the "unprecedented" offer to allow an extra two years and
> 25 per cent cost increase was initially rejected by the French owned shipbuilder, Naval Group.
>
> It instead wanted a three-year schedule delay and for an allowance of a 30 per cent increase
> in delivery costs, but the company later backed down.