Northern Ireland: Derry girls and the election

This year's Northern Ireland assembly election is seen as one of the most important ever - with the possibility that Sinn Fein could emerge as largest party for the first time. Martha Kearney speaks to younger voters on a Derry Girls tour, and to the sister of Lyra McKee, the journalist shot dead during Republican rioting in Londonderry three years ago. (Photo: Martha Kearney and a Derry Girls mural. Credit: Tom Smithard/BBC)