This is from the report:
"At Kent Intake Unit (KIU) detainees were held in two rooms, one holding up to 85 detainees and a family room for 34. The unit was newly built and rooms were in good condition, warm and brightly lit, although there were no windows. The rooms contained soft chairs and fixed tables with seating, televisions and information screens. Pillows, blankets and thin mattresses were available, but the arrangements for cleaning bedding after use were inadequate. "
It also says at the start:
These facilities primarily hold migrants who had arrived from France on small boats after undertaking sea crossings of the Channel. Western Jet Foil functions as an initial point of entry where people undergo initial health checks and are given an opportunity to change out of wet clothes. Manston is a shortterm holding facility where immigration documents are issued and some detainees start the asylum screening process. The Kent Intake Unit is mainly used for unaccompanied children who arrive at the coast to be supervised, identified, interviewed and issued with immigration documents.
Unaccompanied children were transferred in small groups to the Kent Intake Unit (KIU), where they received an induction interview by Mitie Care & Custody staff. The induction was sometimes not detailed or documented enough when numbers were high. After induction, children were put in a holding room, often with unrelated adults (see paragraph 2.40) where they had access to toiletries, food and drink. They had been unable to shower until the week of our inspection when the facilities were repaired and brought into service.
So there are 2 rooms at KIU - including the smaller family room. It seems that KIU is mainly used for unaccompanied children - so it's unclear why it's called a family room
Report on an unannounced inspection of short-term holding facilities at Western Jet Foil, Manston and Kent Intake Unit, by HM Chief Inspector of Prisons 30 January - 17 February 2023 (justiceinspectorates.gov.uk)