FLIP will be running regular, free* improv classes from 2019. In the meantime, the following free classes already exist in London:
Puddle Jumping A free monthly introduction to Improv at the Nursery Theatre. It’s on the first Sunday of every month from 2-5 near London Bridge. Email email@example.com well in advance to reserve a space.
QI: Queer Improv A group who have an open membership policy to any LGBTQIA identified improviser. Join at one of the open rehearsals, held every two months, and you are welcome at all rehearsals of that cycle (all free of charge).
Improv for the Shy and Anxious A free taster on Oct 19 ahead of a weekly drop-in launch. Give it a go!
*By donation, though £0 is acceptable