The Crypt Gallery under St Pancras New Church, Euston Road, London.
The church was built in 1819-22 and the brick walled crypt stretches under the whole church. The section shown in this model is the part open to the public as an events space. However it still contains old church memorials and tombs.
You can hire the crypt through their website: http://cryptgallery.org/
2598 photos taken in December 2020 with a Sony a6000 and processed in Agisoft Metashape. Thank you to Anne the Crypt Manager and Anne the Vicar for access and permission to capture this amazing space. Thank you to Matthew Bliss for originally suggesting the location and putting me in contact with the church.