Anger in UK over anti-homeless device

London has a growing number of homeless people as a result of a combination of factors, including inflated rental prices, a chronic supply shortage of affordable new housing and cuts in welfare spending.Now, one luxury apartment block has caused a huge row after making it clear homeless people are not welcome by cementing rows of metal spikes into the pavement outside the building.Al Jazeera's Simon McGregor-Wood reports from London.