Cadan is the Welsh Lib Dem Spokesperson for Young People, Equalities and the Welsh Language.
Cadan ap Tomos was the Welsh Liberal Democrats' youngest ever candidate for Cardiff West. He grew up in Ceredigion before going on to study at the University of York.
Cadan has worked as a self-employed Welsh translator, is a former school governor and non-profit company director.
Cadan joined the Liberal Democrats in 2011 and has campaigned on many issues, including to lower the cost of public transport for young people in Wales. His campaigning resulted in a bus pass discount for 16-18 year olds being agreed in the recent budget deal between the Welsh Liberal Democrats and the Welsh Government, due to begin in September 2015.