//As a civilised nation we absolutely should accept genuine asylum seekers - it would be unconscionable not to.//
'fraid I disagree, dd. We have no room. Housing, health, education and everything else are all on the edge here. As it is, hundreds of thousands of people are being admitted to this country legally every year. That needs to be curtailed too. We simply do not have the facilities. Apart from that, those arriving from France are not genuine asylum seekers. They come from a safe EU country and are not fleeing danger or persecution.
There is no point devising plans to "dissuade" migrants from coming here. Nothing will. They need to be physically prevented from landing.