http://www.publications.parliament.uk/pa/ld200203/ldselect/ldeucom/133/13305.htm
It sounds like our border problems. (It's the EU proposed solution) It obvious we've been set up, when you read it.
In another report I read where some govts. in the EU don't like the idea of joint BP, because foreign police would be able to arrest or detain citizens on their own soil.
No question, joint borders means no borders. Whether it's the EU or the "NAU."