I watched the program last night, and I couldn't help thinking that the fuel thing was a bit of a red herring. Final reserves should not of course be used, but getting near to them, or thinking you will be using them due to diversions, for example, can and does happen not just at RYR. When I was at Jet2, an edict from management also required a reason as to why extra fuel was carried. Although my current airline will never question a fuel decision.
The real reason of intimidation, bullying, cost-cutting and undue pressure on crews to operate no-matter-what, and the subsequent implication on flight safety, is surely the real story.
I can't see MOL will get anywhere suing either. It seemed all pretty black and white, with enough evidence to make each claim. I'm sure Channel 4 had it legally cleared before transmission.