According to uk fire safety regulations for offices every single office building must have a fire risk assessment carried out within the previous 12 months.
Room within a room fire safety.
The safest place for a safe room is underground.
Single direction of escape out of room and along a corridor before a choice of escape routes becomes available.
Building a new wall to subdivide a room or create a new room can affect the means of escape from fire.
If there are 5 or more people employed in the office then the fire risk assessment must be written down.
A small room reception cupboard or toilet may be sited within the enclosure of an escape stair if the fire risk is considered low and all other parts of the building served by the escape stair have at least one other escape route.
An inner room poses a serious fire risk because if a fire starts elsewhere in your home there s no escape route available and you could get trapped.
The situation you describe of an inner room is mentioned in the both adb and the dclg fire safety guides.
Know the best place to build or create a safe room.
So therefore these will basically be a room within a room effectively saying there will be no wall within the unit which adjoins the main ceiling of the unit for the exception of the boundary walls to sides front and rear.
Inner bedrooms are particularly dangerous as an inhabitant may be deeply asleep and perhaps even under the influence of alcohol when a fire starts in the outer.
A first floor interior room is also a good location.
Single direction of escape within a room before a choice of escape routes one of which goes through a fire door into another compartment.
An inner room is simply a room that is reached through another living area known as an access room or outer room they pose a threat to life because a fire in the access room can seriously impede escape from the property.
Room from which escape is possible only by passing through another room the access room an inner room is at risk if a fire starts in the other room the access room that is a room through which the only escape route from an inner room passes.
If in doing so a situation is created whereby the route for leaving an existing or new room is only possible through another room then an egress escape window from the existing or new room inner room will be needed as well as possibly one or more smoke alarms.