Where will they live?
From another Guardian piece,
"If there is one thing that revolutionary communists and bankers can agree on, it is that there is a housing crisis in Britain. There are too few homes, usually costing too much, often in the wrong places, and often of poor quality. The crisis damages lives, breaks up families, blights employment prospects, reduces mobility and slows the economy."

"The housing crisis is an accelerating human disaster. It is creating exploitative landlords, overcrowding and poor-quality homes. Private renters spend 40% of their income on housing. It is shocking that many people in their 20s now regard it as an accepted fact that they will never have much by way of a home."

"The most obvious cause of Britain's housing is the simple operation of supply and demand. The country's population is increasing, and we like to live in smaller units than in the past. A figure of about 240,000 is consistently estimated as the amount of new homes Britain needs each year, and with equal consistency it is never achieved. In 2014, fewer than 120,000 were built."
http://www.theguardian.com/society/2015/mar/14/britain-housing-crisis-10-ways-solve-rowan-moore-general-election