In November 2022 whilst in post production, the location used in the film was hit by a flood and much of the furniture and walls were destroyed in the process.
Mathew J Wilkinson wrote an initial draft in 2018, but under budget restraints had to strip it back to one location. He attempted filming in December 2021, but had to reset and try again in June 2022.
Although Eleven and Thirteen's names are never mentioned, the shooting script called the character Thirteen, Alice, to not confuse those auditioning for the part. This was inspired by Alice in Wonderland. Twelve is revealed to be Benny and Eleven may or may not be lying when she says her name is Laura.