LONDON, ENGLAND - SEPTEMBER 12:  Jeremy Corbyn speaks in Parliament Square at the end of the demonstration on September 12, 2015 in London, England. The demonstrators are calling on David Cameron to accept more refugees already in Europe. Earlier in the week he announced the UK would take up to 20,000 Syrians, directly from refugee camps on the borders of Syria, over the next four years.  (Photo by Ben Pruchnie/Getty Images)