Radiation detectors in Britain recorded a fourfold increase in uranium levels in the atmosphere after the shock and awe" bombing campaign against Iraq. Environmental scientists who uncovered the figures through freedom of information laws say it is evidence that depleted uranium from the shells was carried by wind currents to Britain. Government officials, however, say the sharp rise in uranium detected by radiation monitors in Berkshire was a coincidence and probably came from local sources. Each detector recorded a significant rise in uranium levels during the Gulf war bombing campaign in March 2003. The reading from a park in Reading was high enough for the Environment Agency to be alerted. "This research shows that rather than remaining near the target as claimed by the military, depleted uranium weapons contaminate both locals and whole populations hundreds to thousands of miles away," [Liverpool University's Chris Busby] said. Busby's report shows that within nine days of the start of the Iraq war on March 19, 2003, higher levels of uranium were picked up on five sites in Berkshire. On two occasions, levels exceeded the threshold at which the Environment Agency must be informed, though within safety limits. The report says weather conditions over the war period showed a consistent flow of air from Iraq northwards.