Chelmsford MP Marie Goldman makes the point that HMP Chelmsford this is a remand prison, which means it is used to having prisoners coming and going quite frequently.
They are held in HMP Chelmsford for not a very long time, usually when they are waiting for trial or maybe for a couple of weeks after they have had trial and waiting to be transferred to another prison.
John Podmore - a former governor of HMP Brixton, Belmarsh and Swaleside, and a former prison inspector - said the process of moving prisoners is "fairly complicated" and he hoped a "lower down official is not thrown under the bus".
"This is not one person making one decision, there should be checks by a range of people up and down the hierarchy," Mr Podmore told Today.
"It should be seen in the context of wider failure. I am afraid this is what happens in a broken system and the prison system is broken. This is a symptom of a wider failure of the prison and the probation service."