Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. building divisions
7. rooms and spaces
8. [rooms and spaces by function]
9. protective spaces
10. bomb shelters

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment
4. Single Built Works
5. single built works
6. single built works by specific type
7. single built works by function
8. shelters

Anotations

Scope note:

Reinforced underground shelters, either specifically designed or improvised, to give the civil population or military personnel protection against enemy bombing attacks by aircraft, particularly shelters dating from World War II or the inter-war years.