diff --git a/recommendations/Mds.py b/recommendations/Mds.py
index 9fe3ff09..b03a52d3 100644
--- a/recommendations/Mds.py
+++ b/recommendations/Mds.py
@@ -244,10 +244,16 @@ class Mds:
             recs = self.heating_recommender.recommend_hhr_storage_heaters(
                 phase=phase, system_change=True, heating_controls_only=False, _return=True
             )
-            recs = self.insert_recommendation_id(recs, measures, "high_heat_retention_storage_heaters")
-            mds_recommendations.append(recs)
-            if self.optimise_measures and len(recs):
-                phase += 1
+            if recs is None:
+                logger.info(
+                    f"No recommendations for high heat retention storage heaters, current heating "
+                    f"{self.property_instance.main_heating['clean_description']}"
+                )
+            else:
+                recs = self.insert_recommendation_id(recs, measures, "high_heat_retention_storage_heaters")
+                mds_recommendations.append(recs)
+                if self.optimise_measures and len(recs):
+                    phase += 1
 
         if "low_energy_lighting" in measure_config_list:
             raise Exception("check me out 9")