I have to say that I don't think I have studied it in detail.
In general, the U.K. approach to China, like that of many other governments, has not been totally consistent or satisfactory, especially with regard to its special obligations to Hong Kong. It has made statements condemning, for example, the imposition of the security legislation—the second one, article 23—but it has not imposed consequences.
In talking about concrete steps, we are asking for targeted sanctions on Hong Kong Chinese officials who were responsible for this security legislation.
Hong Kong officials, unlike Chinese officials, do travel abroad and have families abroad. These kinds of sanctions would send the right message to the Chinese government that repression has a cost.