Davies was elected as a Member of the European Parliament for the North West England constituency in 1999 and served as the Liberal Democrat spokesman on the Environment, Public Health and Food Safety Committee (ENVI) in the European Parliament. In December 2009 Davies appeared on "The Politics Show North West" alongside Nick Griffin on a debate regarding climate change and the then forthcoming 2009 United Nations Climate Change Conference in Copenhagen, which both men were attending as part of the EU Committee on the Environment, Public Health and Food Safety.