How do you audio describe Game of Thrones?

Every Saturday during the run of the show, audio describer Neville Watchurst is in a booth at SKY, writing and recording the audio description for the brand new episodes of Game of Thrones. 

How does he convey the action, how does he avoid giving spoilers, and how does he fit it all in? Robert Kirkwood finds out.

Every published book in George R. R. Martin's epic saga 'A Song of Ice and Fire' is available in Braille, giant print and audio from RNIB Library.