Spanish police say they're detaining dozens of migrants every day in the port of Bilbao

Spanish police say they're detaining dozens of migrants every day in the port of Bilbao, and are working through the night to stop large groups of migrants attempting to stowaway on UK bound ferries. Authorities in Spain say the number of migrants appearing is increasing as the route becomes more popular, and camps around the port are growing rapidly. The camps have only started to appear in recent weeks, and authorities fear a repetition of what happened in Calais. The BBC's Gavin Lee sent this report from Bilbao..
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