Offer now expired: You could win one of 12 pairs of tickets to Greenland at the National Theatre

In an effort to understand what is acknowledged as a subject of great complexity, the National Theatre asked four of the most distinct and exciting playwrights in British theatre to collaborate on a new piece of documentary theatre about climate change. This team spent six months interviewing key figures from the worlds of science, politics, business and philosophy to try to understand our changing relationship with the planet. The result is Greenland , which combines the factual and the theatrical as several separate but connected narratives come together to form a provocative response to the most urgent questions of our time. Greenlands runs at the National Theatre until Saturday 2 April. Extra members can win one of 12 pairs of tickets to see the play at the National Theatre The competition closes at midnight on Sunday 20 February. Extra members can also get best available seats for £15 (saving up to £15) tickets to see the play. Click here to take up the discount ticket offer. Enter this competition Offer now expired Help with Offers and Events Help with Offers and Events •You need to be a member of Extra in order to see the redemption pages. You can sign up here. •Members also need to sign in to guardian.co.uk at the top of the screen in order to take up an offer, book for an event or enter a competition.