//Sort of ... But France said if they voted leave that France would no longer try and stop illegals from going into the tunnel.//
Then England needs to turn it inot a roach motel. Then can go in, but they can’t get out. Its not like they can go up, or out a window. Really really tight customs/security at the UK end and strong policy. Its not like France was going that great of a job in the first place.
Simple answer: flood the chunnel.