TheKnightWho
Established Member
Yes, the Sangatte camp was closed, but those who had been living there remained in the area. Subsequently new camps opened:
http://www.dailymail.co.uk/news/art...nside-new-mini-migrant-camp-close-Calais.html
The other issue is terrorism; like it or not the Channel Tunnel is a potential target for a terrorist attack, and passengers' luggage needs to be screened at the stations served. You could check passports on the train, but you couldn't x-ray luggage.
I know some will argue that the chunnel is not fundamentally different from the Severn tunnel or Ffestiniog tunnel, but the reality is that some places are more at risk than others.
And why is it more at risk? Being an international boundary isn't particularly notable from the point of view of a terrorist.