Title should be updated to "Glenfiddich plans to use..." - the article is dated July 2021 and they're talking about making this transition. The current title makes it sound like it's an established practice at the company already.
its whisky waste-based biogas is already powering three specially converted trucks
I've added "will" to the title. We can call that the Hedberg tense (i.e. they're using, and they will use as well).