Oil spills by North Sea rigs: which is the worst?

North Sea oil rigs operating in UK waters suffered major or significant leaks at a rate of almost one every week throughout 2009 and 2010. The revelations of spills off the UK's shores come as part of a Guardian investigation showing shortcomings in safety and oversight in UK operations.

The data, obtained through the Freedom of Information Act, shows more than 25,000kg of oil and gas leaked from UK oil platforms between January 2009 and December 2010, in 110 separate incidents.

Source: The Guardian