Fans of the HBO Game of Thrones series have been treated to a second trailer.

Titled Power and Grace, the clip hints at the rivalries that will form as different factions stake their claim on the Iron Throne.

Based on A Clash of Kings, the second book in author George RR Martin's A Song of Ice and Fire series, the second season of the TV show will see the characters of Stannis and Renly Baratheon gain prominence as they clash with the Lannister family and King of the North Robb Stark.

The series will premiere on 1 April.