UK Borders Bill

My Lords, would it not be possible to draft that clause in a different way so as not to make legislation retrospective? I do not like the fact that we are doing that. We are always fighting attempts to make retrospective legislation because it is not fair on people, but let us not go into that. I did not really understand the noble Lord’s answer; I do not know if he did. I think he got the information from those who are well-informed. I shall read with interest what he said.