The head of the TUC union Brendan Barber has said that the alleged treatment of unpaid jobseekers working as stewards at the Diamond Jubilee highlights the "damage" that can be done to unemployed people desperate to get back into work.
He warned that it was not an isolated incident, as a Downing Street spokeswoman claimed earlier.
This case has attracted attention because of its link to the Diamond Jubilee. Sadly low-paid vulnerable employment such as this occurs on a daily basis throughout the country. The number of involuntary temporary workers is at a record high.
More top news
Dealing with migrants has become "part of the day job" for truck drivers, a haulage firm has told ITV News.
The Hearing Clinic has been hit with a £220,000 fine for bombarding people with millions of nuisance calls.
British Athletes are unlikely to achieve the same Olympic medal tally at Rio as they did at London in 2012, the head of UK Sport has said.