The article you linked does not support the claim that the UK police not liking someone's face is sufficient for them to be allowed to stop and search someone.

In fact, this goes directly against the PACE guidelines as described at https://www.college.police.uk/app/stop-and-search/fair

> A person’s physical appearance [...] cannot be used as the reason for stopping and searching them [...] unless there is information or intelligence giving a specific description of a person suspected of carrying an item for which there is a power to search.

Guidelines have never stopped authoritarian hell holes. They can just make shit up.