Digital Economy

I wonder whether I could press the Minister on the robustness of age verification, which is of interest to the wider debate. It seems that certain types of checks, such as those that run off a credit card, are extremely robust, but younger people do not have access to credit cards, so that becomes more difficult, although we can layer up different types of information to give a best guess. Of the long list of checks that she has mentioned, which is favourable in terms of robustness and quality?