Migrant crisis at Calais is only a short trip by boat and truck to Ireland

I think the port of Calais is 32 miles from Dover. The migrants at Calais are relentlessly testing the boundaries (literally) of the Channel Tunnel and the Port of Calais.

Remember, many of the migrants are desperate veterans of a massive camino across the Sahara, veterans of a terrible sea crossing from Libya to Italy, from Turkey to Greece.

How long will it be before migrants start spreading out along the coast of northern France and buying (or taking) boats?