The offer is only bookable through Delfont Mackintosh Theatres: either online, in person at the theatre, or by calling the Novello Theatre box office on 0344 482 5151.
If booking online, the £20 saving has already been added to the ticket prices for performances from six weeks in advance.
Everyone, regardless of age, must have their own ticket to enter the theatre. Children under the age of 16 must be accompanied by, and seated next to, a ticketholder who is at least 18 years old. Children under the age of 3 will not be admitted.
