The government has only agreed to one out of 33 recommendations made by a public inquiry into abuse at the Brook House Immigration Removal Centre, according to its chair.
A year on from the inquiry's final report,Kate Eves said the government was "failing to listen" to her proposals for "urgent change".
The response of the Conservative government was "inadequate and disappointing" and Labour needed to show more commitment, she said.
In response, the Home Office said: “The abuse that took place at Brook House in 2017 was unacceptable and we are committed to ensuring it will never happen again.”
The Brook House Inquiry report detailed 19 serious incidents where detainees at the centre near Gatwick Airport were abused by staff, following an undercover investigation by BBC Panorama in 2017.