I would like to find case studies of accidents and incidents involving contractors, sub contractors and the company who appoints. Does anyone know if there is a good source for this?
thanks in advance

Front page today here:

http://www.safetynews.co.uk/

has this on the front page:

Requirement to supervise contractors
A 32-year old man died when he fell through a fragile roof at Tullis Russell Papermaker Ltd’s warehouse in Markinch, Fife, on 29th September 2008. One of a number of men working for a contractor, the deceased fell to the concrete below where he died immediately.
The contractor had informed its client, Tullis Russell, that crawling boards would be used on the fragile roof, but they did not do so and workers were obliged to access the roof by stepping onto it.
Tullis Russell did not check that crawling boards were being used and failed to bring the unsafe work practices to a stop, even though its own procedures required that work carried out by contractors should be monitored on a daily basis.
The company was fined £260,000.