Jury trials are an ancient Germanic tradition without cultural precedent in most countries. Lee Kuan Yew eliminated jury trials in Singapore because he didn’t believe they were viable in a multi-cultural country: https://www.postcolonialweb.org/Singapore/government/leekuan...
Singapore is also a pretty authoritarian state. Not to put down the amazing work that Lee did in making it a functional, successful state that's substantially wealthier than its neighbors, but it's a product of the time and place of its formation that made a lot of hard choices to prevent it from spinning out into nothingness or being absorbed by its much larger neighbors. I wouldn't call it a model for the UK.