That’s worse than the longest shift I’ve ever done, 8am to 8pm back in the days (early 80s) when we had British Rail. Mind you, the Union had negotiated double time (or something like that...memory is slightly hazy) which made doing ‘overtime’ well worth it. My Mum also worked for BR, as did her father. He said some of his colleagues who worked the system killed the golden egg.
I’m not a fan of privatisation, but I can see how it happened. More a symptom of weak management though.