UK Borders Bill

My Lords, I have not been involved with this Bill so far, because I have had other commitments. I wonder whether the Minister would explain precisely what is meant by ““designated immigration officer””. I remember discussions some while ago on previous immigration legislation, when I had concerns because there was provision in that Bill for the Secretary of State to contract out part of the Immigration Service. That meant that the work could be contracted out to people who had not had the professional training that was required for people doing this work as public servants. I would like to know what designation involves. Does that mean that the people concerned would have the specialist training that surely would be required if they are going to be able to use reasonable force and where they have quite wide powers? Will my noble friend tell us exactly what that means?