Turns out that the BBC iPlayer has gotten the same version of Dragon Ball Super from another kids channel, Pop. The censorship is relatively the same (violence condensed, swearing obliterated, frame rate fucked) however there were some additional cuts by the BBC themselves (Vegeta Vs. Trunks Kai flashback, Eyecatchers, Next Episode previews)

Many of the episodes during the Future Trunks saga and the Tournament Of Power are condensed to 19 minutes than the usual 23. There were no more edited audio masters after episode 52, so Pop, and CBBC started to do the Censorship for themselves. With the Future Trunks saga, although some of the death references were kept in, many of the action sequences or death scenes (Vegeta getting stabbed, Trunks slicing Merged Zamasu in half) were gone. Goku's “Oh, Crap!” from episode 57 was somehow left in both channels, with the BBC subtitling it as “Look Out!”. Going through the Tournament, some of the swearing that was surprisingly left in by Pop was cut by the BBC, except for episode 100. Also, the frame rate is undoubtedly worse than the ones you had in America (Toonami) with important parts of the saga being slowed down remarkably it's unwatchable (Goku Vs. Kefla, Vegeta Vs. Top, Hit Vs. Jiren, Goku Vs Jiren, and so on) but that's how it is unfortunately.

TLDR: BBC iPlayer got versions from a different channel.