Catherine took part in a series of events aimed at candidates for the European Parliament last week, including discussions on policy and presentations from Vice-President of the European Commission, Siim Kallas, and Jules Maaten MEP.
Catherine commented: "Liberal Democrats are showing our commitment to working with parties from right across Europe to achieve the best for Britain and for all Europeans."
"Unlike the Conservatives, the Alliance of Liberals and Democrats in Europe (ALDE) is working to build a stronger Europe to get us through these difficult economic times."
"By abandoning other parties in Europe, the Conservatives have isolated themselves on the lonely fringes of Europe's homophobic and xenophobic far right wing. David Cameron appears determined to destroy Britain's credibility, and our ability to fight for real and positive changes in Europe."