Exclusive Mandela: Long Walk to Freedom Clip

There's already serious awards buzz surrounding Idris Elba's performance as Nelson Mandela in biopic Mandela: Walk to Freedom .

And our exclusive clip gives you a hint why.

The scene, in which Elba's Mandela makes a defiant stand for human rights, is as powerful as it is arresting.

Watch the clip and then let us know what you think in the comments below.

Mandela: Long Walk to Freedom opens in UK cinemas from 3 January 2014.