From The Mail:
"The majority of Polish migrants arriving in Britain plan to stay permanently, research has revealed. The finding undermines official suggestions that many Eastern Europeans in the UK are short-term visitors with no intention of remaining. A study found more than half those arriving to work want to stay for at least four years - and many plan to remain indefinitely."
So four years is "permanent"? And when you read the whole story, you learn that the survey showed only ten percent of the 1,389 Poles interviewed at bus stops and railway stations said they planned on staying in Britain for good. Nothing scares like a good "swamping" story, eh?