My Lords, the Minister's departmental website, which I trawled yesterday looking for evidence and research on HIPs, does not show any recent research. I could not find the reference to the independent research that she mentioned. The website did tell me that I could subscribe to Ministers' "twittering" but that is not entirely helpful in this context. The Government cite the need for an evidence base. What evidence do they have on the effect of requiring a HIP from the first day of marketing, a change to be introduced at the beginning of April, as she mentioned? What difference will that make?