The prison population in England and Wales has reached a new all-time high of 80,977.
The record was up 165 on a previous high set just three weeks ago.
It means the jails are just 481 places away from their absolute capacity.
It included 415 prisoners being housed in police stations and 24 in court cells.
Director of the Prison Reform Trust, Juliet Lyon, said: “Forget rehabilitation – imprisonment is now reduced to a dangerous game of musical cells.
“Prison after prison is reaching its safe operating limit so people are being decanted into unsuitable court and prison cells.”
“In some cases, they are stacked up in escort vans reeking of urine. This is no way to run a criminal justice system.”
Jail population hits new high