LONDON, ENGLAND - FEBRUARY 20: Protesters and migrant workers hold banners and flags as they demonstrate outside Parliament on February 20, 2017 in London, England. A day of action in support of migrant workers and EU citizens is held today to highlight their contribution to the UK economy and to call on the government to guarantee their right to remain in the UK after brexit. Peers in the House of Lords are to begin debating the brexit bill which will pave the way for the UK to leave the EU.(Photo by Jack Taylor/Getty Images)