The UK's railway network was only privately owned from 1994 to 2002 though, everything after that is already under the umbrella of re-nationalisation, which didn't go super well either (my knowledge about that is rather vague). Not sure how useful 2025 numbers are in this context.

[ed.: to be clear - AFAIK they are in the same state currently, private company but 100% government owned. But there's a huge distinction in that the UK has made the decision to move back in the direction of nationalisation. In Germany, some people still pretend this is somehow fine and just needs to get cleaned up before the privatization can continue.]