The reorganisation of the Dutch prison system is being done so quickly that it has become chaotic, according to the FNV civil service union Abvacabo.

The union is urging junior justice minister Fred Teeven to slow down the process and ensure all agreements made about staff who are losing their jobs or being moved are met.

Around 100 people have reported problems to a union hotline about lack of leadership, random placements, the high pressure of work and broken promises, RTL news reports.

The shake-up involves closing prisons and boosting cell sharing among inmates in an effort to save €340m.