We may not be in Shengen but if the guy you mention who travelled freely between Belgium and France arrived in Dover with a Belgium passport as a tourist, do you think he would have been refused entry, whether or not we were a member of the EU?

I don't see any connection between Human Rights and the recruitment of local individuals as terrorists.

I'm not suggesting for one minute that we should relax our border controls - all I am pointing out is that calls for them to be virtually closed are unlikely to decrease the risk of terrorist activities but will most certainly make it far more difficult for, and make this country less atrractive to, tourists,and business travellers as well as making imports and exports more expensive.