Wouldn't that be a good reason to do small claims? I can't imagine why I'd want to wait for years in a class action when I can just do a small claims.

Also class action cases are very rare in the UK. In the past the courts have generally refused to approve class action cases. It not like in the U.S. where there’s a cottage industry around class action cases. I’ve personally never heard of a class action case happening in the UK, I know they do happen, but they’re so rare that they don’t make it into the news, and most people will never involved in one either directly or indirectly.