Profile this week looks at the life and a career of a politician at the centre of political deadlock in Northern Ireland.

40 year old Michelle O'Neill is Sinn Fein's new leader in the north. She was appointed in January after Martin McGuinness stood down, but has yet to make her debut leading her party in the Northern Ireland Assembly because power sharing has been suspended. This week, Sinn Fein and the rival DUP both blamed each other for the impasse - rejecting each others terms for getting talks re-started.

Mark Coles hears from Michelle O'Neill's friends, colleagues and the occasional political foe to try to understand what makes her tick.

And discovers why, in a new play about her and DUP leader Arlene Foster, they're really good friends who enjoy clubbing and drinking in Ibiza.

Producers Smita Patel & Sandie Kanthal