Starmer announces resignation as prime minister and leader of the Labour party
(www.theguardian.com)
The majority of crimes are already summary only, that's just the consequence of there being a lot more petty thefts and speeding than murders.
I'm not a fan of the impression that moving more cases from either way to summary only is being done for reasons of costs, but you are making it sound like this is trial by jury going away for everything when it very much isn't.