Earlier quoted context omitted.
No, much bigger. They're going to start requiring OA.
Peer review also needs a reboot. It's epically unhelpful and slows down publishing dramatically, Think they should mandate post publication review.
https://wellcome.ac.uk/news/why-were-launching-new-publishin...
Momentum is important. There's no reverse on a submarine. One of the biggest funders in the world has taken away a standard excuse for failing to openly report results, negative or otherwise. It is free to readers and free to authors funded by the Trust. And all of the reviewing process is out in the open.
This is a huge step. The only other funding body I can think of with similar weight is NIH, and (at least internally) they're starting to move in the same direction.