Inner Room, Means of Escape Window, Location of stairs

PMBC

Is a room at ground level, which has no direct access to a stairs/direct access to a hallway leading to a door, an Inner Room if it has a means of escape window?

Can a stairs serving only the first floor in two storey domestic situation end in such a room which is not a kitchen?

Thanks for any help and apologies for the tortuous text above.

Mellor

Certain inner rooms are required to have escape doors/windows. Which suggests that presence of an escape window does not prevent something being an inner room.

1.3.9.1 Inner rooms

An inner room is where the access to that room is through another room. A habitable room should not be an inner room unless it is located at basement, ground or first storey and is provided with a window or door suitable for escape or rescue in accordance with the provisions of 1.3.7.

A stair can end in a room, provide there is a exit door with in 4.5m

1.3.2.1 An open-plan arrangement, where the stairway rises directly from the ground storey accommodation is less preferable than the arrangement at (b) above and is only acceptable where: (a) the stairway discharges to within 4.5 m of a door (final exit) at the ground storey leading directly to the open air;