Brexit: Leave the EU Closed the Gap

In ten days, Britain may vote to leave the EU. A number of the latest polls show the “leave” side with a lead. The forecast polls, which average multiple polls, are following, albeit more slowly.
Immigration and return of sovereignty appear to be the main reasons voters give to quit the EU.

See:
Financial Times: How accurate are the Brexit polls?
Ah! Les sondages blog: To Brexit or not to Brexit…