I agree that threats are unacceptable, but they are based on the notion that the border starts on the other side of the channel - for both countries . The original agreement was signed when no one had any idea what was going to happen, tho actually it works in favour of both countries. Britain pays a lot of money to help with the management on the French side. its called working in partnership, and is generally better than lobbing accusations of blame st each other. Longer term, the people trafficking needs to be clamped down on even harder, but it's hard to know how you can really stop people who are desperate wanting to come to Europe. Eritrea is not the worst country in the world for example, but it seems their conscription policy, probably based on paranoia about Ethiopia, drives people away