Mark Coles profiles the DUP's leader at Westminster, Nigel Dodds, one of a number of possible post-election kingmakers. Dodds, furious to find his party excluded from the leaders' debates, is now being watched carefully to see which - if any - other parties he might support in coalition. Nigel Dodds is conservative and religious. He is opposed to gay marriage and abortion and believes Britain would be better off outside of the EU. But does that really tell us where he might put his support?

Producer: Smita Patel.