Hopefully this meets reputable news source requirements, as Declassified UK is a well known investigative news group with a heavy focus on political UK corruption.
I've linked to them before and my interpretation of 'reputable news source' is one that at least tries to be reliable. So as long as they don't publish outright disinformation, stuff like the Daily Mail or the Grayzone, then you should be fine. I trust Wikipedia's Reliable sources page for stuff like this.
This group is probably better, but I've had some weird removals over at world@lemmy.world. Like, the other day I posted an article about China's banks cracking down on any loans being given to Russian companies. And the article was in the business newspaper Vedomosti and the mods removed it for being a "questionable source" and never replied when I asked them why.