The Harry Potter actor can no longer remember his lines
Overall revenues and attendance rose again in 2014, as did ticket prices
The three-day festival will explore the journey of drama from page to performance
These Trees Are Made of Blood centres on 'one mother's search for her daughter, and a nation's search for answers'
Knight and Made in Dagenham's Sophie-Louise Dann will join Eva Noblezada and Rachelle Ann Go in the sold out show on 15 February