A protester holds a placard that reads "Rent Control Now!" during a demonstration dubbed "The March for Homes" calling for solutions to housing problems outside City Hall in London on January 31, 2015. The demonstration was organised by the Focus E15 movement which was started by mothers, all aged under 25, who have waged a campaign of occupations and anti-eviction protests that has shaken up the debate as housing becomes a major issue ahead of Britain's May 2015 general election. The march called for more affordable housing, more social housing and rent controls. A popular investment for the world's wealthy, the average cost of a London house is now more than £500,000 ($790,000, 630,000 euros), according to the Office for National Statistics. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP via Getty Images)
