Nick was born and bred locally and was educated at Croesyceiliog Comprehensive School. He went on to study at Durham and Cardiff Universities. After a spell in the private sector and working as a political advisor, Nick was elected to Monmouthshire County Council in 2004 for the ward of Mardy near Abergavenny. In his role as a local councillor, Nick was involved in numerous campaigns supporting residents and standing up for local people.
Nick was first elected to the Welsh Assembly in 2007 and has since held the most senior shadow ministerial portfolios including Local Government, Business and Health. Nick is currently the Shadow Finance Minister and chairs the influential Public Accounts Committee, which scrutinises expenditure by the Labour-run Welsh Government and other public bodies in Wales.
Nick was re-elected by the people of Monmouth in May 2016 with a majority of over 5,000 votes. Nick has run numerous successful campaigns including to save Monmouthshire from abolition and has fought alongside local residents for a Cancer Patients' Fund for Wales to end the postcode lottery in access to life-extending cancer drugs.