Counter-Terrorism and Security Bill

My Lords, I appreciate my noble friend’s extensive reply and explanation. I am still somewhat uneasy that the terms of the Bill are permissive in that the data may need to be retained if it may “assist in identifying”, which is quite loose language. Will my noble friend explore whether there is any way of getting further precision? Presumably the limit of the extent of the kind of data we might be talking about is known, and I feel that what the data are should be spelt out somewhere, even if it is a broad list, so that everybody can understand this matter—I shall join him in the tutorial that he has invited the noble Baroness, Lady Lane-Fox, to carry out, as I have already frankly admitted my own ignorance. It is not helpful to have potential legislation when people do not know what data on them will be retained. It seems reasonable to ask my noble friend to reflect further on the idea of importing the words “necessary and proportionate”, which I think he used, into the Bill and/or to consider further whether it is possible to spell it out in regulations. In awaiting, I hope, that further reflection, I beg leave to withdraw the amendment.