The chairman of the Prison Officers Association (POA) has said that the organisation has complained "for years" about "overcrowding in the prison estate".
We have been saying for many years now that we have overcrowding in the prison estate, people are being put into open conditions who are unsuitable for open conditions.
Twenty prisons have closed in the last three years and prison staff numbers have reduced by 6,000 since 2010.
There is immense pressure on the system and it is clear to me that the tick box mentality that goes into transferring prisoners to open conditions has failed the public.
The comments were made following revelations that convicted murderer Arnold Pickering has gone on the run from prison for the third time.
More top news
In the unexpected announcement on Monday, Mr Key said it was the "right time" to leave politics.
As the Government's Brexit appeal comes to the Supreme Court, here's a look at what you need to know.
According to local reports, the man was found by friends in their accommodation in Val Thorens resort in the Alps on Sunday morning.