First of all, no need to be rude, but then again, you're probably quite insecure about all these posts on your profile about hydrogen... Read the following, but please have a seat first because I don't want you fainting or panicking after you realize who's the ignorant one here.

Which is a better source of energy and why, solar or hydrogen? Solar energy is abundant (with caveats) and hydrogen is almost non-existent as free hydrogen. As a means of creating storing and distributing energy for cars, electricity produced by solar PV and stored in batteries beats the “hydrogen economy” by more than two times. Let me explain; The round-trip efficiency of the process electricity-to-hydrogen-to-electricity is around 40%. Less if your vehicle uses a combustion engine, down to 25%. Compared with the same round trip for electricity-to-batteries-to-electricity at 85%. That means your vehicle needs more than twice the input energy using hydrogen compared to batteries. The “hydrogen economy” seemed like a good idea 20 or 30 years ago. But battery technology overtook hydrogen and now it is simply a niche product. It will remain that way until someone comes up with new materials and processes that make hydrogen cheaper. And even then, (IF it happens) the world will take at least 10 years to transition. Using hydrogen created by renewable energy sounds great until you work the details. You can’t put (much) hydrogen into existing pipelines. Hydrogen creates problems with both hydrogen embrittlement and corrosion, which means it requires special materials for pipes and valves. The problem is compounded because hydrogen can easily migrate into the crystal structure of most metals. And hydrogen just isn’t easy, or cheap, to make. It burns cleaner than fossil fuels, but that is hardly a high bar.

Now, that's just the basics. As far as the video you've posted, it seems that indeed English railways is abt 60% powered by diesel. My bad to presume that the oldest railway nation is also one of the advanced railway nations these days. (still not an excuse to be impolite really). Why in the hell would they want to use electricity to manufacture hydrogen, to manufacture electricity again when solar is making such GIANT leaps lately with both batteries and solar cells...It couldn't be that the oligarchs in UK are worried about the decentralization of their power, literally?!

You've been schooled, lol, i'm sorry