Why is it not legal to serve fresh mayonnaise in an English restaurant?

It is not illegal to serve fresh mayonnaise in an English restaurant; however, there are strict food safety regulations regarding the use of raw eggs, which are a common ingredient in traditional mayonnaise. Since fresh mayonnaise is often made with raw eggs, it poses a risk of salmonella contamination. Many restaurants opt for commercially produced mayonnaise, which is made with pasteurized eggs, to ensure food safety and comply with health regulations.