diff --git a/gwr_feed.py b/gwr_feed.py
index ee95b29..ed66212 100644
--- a/gwr_feed.py
+++ b/gwr_feed.py
@@ -163,7 +163,7 @@ def get_item_listing(query):
                                  fare_price, f"({fare_type_name})"]
 
                     #   'availablespaces' appears to be defaulted to 9 so we will ignore that
-                    if remaining_seats and remaining_seats != 9:
+                    if query.seats_left and remaining_seats and remaining_seats != 9:
                         fare_text.insert(2, f"({remaining_seats} left)")
 
                     result_dict[departure_dt] = ' '.join(fare_text)
diff --git a/gwr_feed_data.py b/gwr_feed_data.py
index 6d505bb..5d75bf5 100644
--- a/gwr_feed_data.py
+++ b/gwr_feed_data.py
@@ -60,6 +60,8 @@ class _BaseQuery:
     timestamp: datetime = None
     weeks_ahead_str: str = '0'
     weeks_ahead: int = 0
+    seats_left_str: str = 'false'
+    seats_left: bool = False
 
     def init_station_ids(self, feed_config):
         self.from_id = get_station_id(self.from_code, feed_config)
@@ -86,6 +88,11 @@ def validate_departure_time(self):
             if not all(time_rules):
                 self.status.errors.append('Invalid departure time')
 
+    def init_seats_left(self):
+        if self.seats_left_str:
+            self.seats_left = bool(
+                self.seats_left_str.lower() in ('true', 'y', 'yes'))
+
     def validate_departure_date(self):
         if self.date_str:
             date_rules = [self.date_str.isnumeric(), len(self.date_str) == 8]
@@ -109,6 +116,12 @@ def validate_weeks_ahead(self):
             if not self.weeks_ahead_str.isnumeric():
                 self.status.errors.append('Invalid week count')
 
+    def validate_seats_left(self):
+        if self.seats_left_str:
+            if not self.seats_left_str.isalpha():
+                self.status.errors.append(
+                    'seats_left should be either true or false')
+
 
 @dataclass()
 class GwrQuery(_BaseQuery):
@@ -118,6 +131,7 @@ def __post_init__(self):
         self.validate_departure_time()
         self.validate_departure_date()
         self.validate_weeks_ahead()
+        self.validate_seats_left()
         self.status.refresh()
 
         if self.status.ok:
@@ -125,4 +139,5 @@ def __post_init__(self):
             self.init_journey()
             self.init_timestamp()
             self.init_weeks_ahead()
+            self.init_seats_left()
             self.status.refresh()
diff --git a/server.py b/server.py
index e8ad887..e42efce 100644
--- a/server.py
+++ b/server.py
@@ -49,7 +49,8 @@ def process_listing():
         'to_code': rq.args.get('to') or GwrQuery.to_code,
         'time_str': rq.args.get('at') or GwrQuery.time_str,
         'date_str': rq.args.get('on') or GwrQuery.date_str,
-        'weeks_ahead_str': rq.args.get('weeks') or GwrQuery.weeks_ahead_str
+        'weeks_ahead_str': rq.args.get('weeks') or GwrQuery.weeks_ahead_str,
+        'seats_left_str': rq.args.get('seats_left') or GwrQuery.seats_left_str
     }
 
     # access_token expires after 45 mins, get a new token for each query