Defra have recently published guidance aimed at assisting landowners and developers when assessing and managing risk from contamination. Under current environmental legislation, property owners and occupiers can be made liable for the cost of cleaning up environmental damage or contamination, either because they caused the presence of contaminants on the land (i.e. they are the original polluters), or simply because they are the current owners or occupiers of contaminated land. In addition, if land is contaminated, it will affect the value of the land, and the ability to develop it.