[trivial] deprived neighbourhood pat lists

paths/population_statistics_deprived_{neighborhood}.yaml

@@ -15,11 +15,14 @@ get:
           - regular
           - unknown
       example: deprived
-      description: The neighborhood is derived from the postcode. If the postcode is not valid, e.g. not in the regular language defined by `[0-9]{4}\s*[a-zA-Z][a-zA-Z]`, then the neighborhood is 'unknown', otherwise the neighborhood is 'deprived' or 'regular'. The difference between the latter is based on national tables.
+      description: |-
+        The neighborhood is derived from the postcode.
+        If the postcode is not valid, e.g. not in the regular language defined by `[0-9]{4}\s*[a-zA-Z][a-zA-Z]`, then the neighborhood is 'unknown', otherwise the neighborhood is 'deprived' or 'regular'. The difference between the latter is based on national tables.
+        NB: Asking for all patients in the `regular` group may result in access denied errors; these lists are generally large and not usually a worthwhile list to provide to medical professionals.
     - name: pii
       in: query
       example: true
-      description: If false, limits the response to only id's.
+      description: If false, limits the response to only patient ids.
       schema:
         type: boolean
         default: false