The Celtic League claims the Manx Government is breaching United Nations guidelines on the treatment of prisoners by housing adult and juvenile offenders together in prison.
Director of Information Bernard Moffatt says overcrowding at Victoria Road (pictured) has forced the move.
In the past, men and women have been forced to share wings because of an accommodation crisis.
Mr Moffatt says that was bad enough, but the present situation is even worse:
Former MHK accuses chief minister of 'belittling and demeaning Tynwald' over Assisted Dying Bill
Quintin Gill writes to Alfred Cannan over behaviour that's 'inappropriate and unworthy of any chief minister'
Medical Staff Committee claims vote of no confidence led to leadership changes at Manx Care
88 percent of members voted to say they had no confidence in the healthcare provider's board
Electronic payment cards and vouchers among alternatives to MiCard under consideration
Remaining MiCards to be withdraw in December, with post office payments ending in March 2027
Tuesday sailings changed due to Manxman maintenance
Two crossings brought forward and will now be operated by Manannan