Could I see their workings please

News that an official review instigated by the last Labour government but reporting to the new Conservative/LibDem government is expected to recommend bringing Britain into line with most of Europe by reducing the legal limit from 80mg of alcohol per 100ml of blood to 50mg, makes me wonder something. We are told that the report is likely to conclude that the reduction would prevent up to 65 deaths and 230 serious injuries a year. Can someone please release the workings that lead to that conclusion, I'd be interested to investigate the statistics...