The way of teaching mathematics in Britain is different from that in China, and even the knowledge points are different. For example, mirror symmetry is taught in math class in Britain, but this knowledge point is not taught in China. Of course, there are also some knowledge points that need to be studied in China, but they don't need to be studied in Britain.
British private schools pay attention to practicality, not a numerical answer. For example, students investigate the prices of similar products in supermarkets and learn how to compare prices and choices. The scope of study is very wide. If domestic mathematics learning is specialized, Britain is broad first, then shallow, and deepened year by year.