Sedos Rehearsal Image. Copyright Sedos 2023. All Rights Reserved. Outstanding Amateur Theatre at London's Bridewell Theatre Sedos presents Lucy Prebble’s play “The Effect” from 21st to 25th March 2023. This play examines challenging topics including fate, loyalty, mental illness and the undeniable power of physical attraction. A small cast of five take on the full weight of a very powerful subject giving us an outstanding production. Tickets may still be available from Sedos but you'll have to be quick as seats are selling fast!