PORTSMOUTH, UNITED KINGDOM - AUGUST 13:  Motorists arrive at the UK border after leaving a cross-channel ferry on August 13, 2014 in Portsmouth, England. Border Force is the law enforcement command within the Home Office responsible for the security of the UK border by enforcing immigration and customs controls on people and goods entering the UK. Border Force officers work at 140 sea and airports across the UK and overseas.  (Photo by Matt Cardy/Getty Images)