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LONDON, ENGLAND - DECEMBER 09: Liberal Democrat leader Tim Farron (C) chats with staff during a visit to the Salvation Army homeless drop-in centre on December 9, 2015 in London, England. Mr Farron met homeless people and discussed their situation with staff members at the centre. (Photo by Carl Court/Getty Images)

LONDON, ENGLAND - DECEMBER 09:  Liberal Democrat leader Tim Farron (C) chats with staff during a visit to the Salvation Army homeless drop-in centre on December 9, 2015 in London, England. Mr Farron met homeless people and discussed their situation with staff members at the centre.  (Photo by Carl Court/Getty Images)