diff --git a/backend/categorisation/processor.py b/backend/categorisation/processor.py
index 2e4bab12..95d4de3a 100644
--- a/backend/categorisation/processor.py
+++ b/backend/categorisation/processor.py
@@ -46,6 +46,8 @@ def process_portfolio(
         if plan.id is not None:  # just in case
             plans_by_id[plan.id] = plan
 
+    logger.info(f"Successfully unset {len(default_plans)} default plan(s)")
+
     # then set new defaults on domain objects under consideration
     plans_for_consideration_by_property: Dict[int, List[Plan]] = (
         _group_plans_by_property(plans_for_consideration)
@@ -68,8 +70,11 @@ def process_portfolio(
             if plan.id is not None:  # just in case
                 plans_by_id[plan.id] = plan
 
+    logger.info("Successfully set defaults on Plan objects in memory")
+
     # then pass all domain objects to database to update (regardless of whether they've changed)
     _update_plans_in_db(list(plans_by_id.values()))
+    logger.info(f"Successfully updated {len(plans_by_id)} Plans in database")
 
 
 def choose_cheapest_relevant_plan(
@@ -110,7 +115,12 @@ def _get_default_plans(portfolio_id: int) -> List[Plan]:
 
     return [
         Plan.from_sqlalchemy(
-            p, next(s for s in default_scenario_models if s.id == p.scenario_id)
+            p,
+            next(
+                Scenario.from_sqlalchemy(s)
+                for s in default_scenario_models
+                if s.id == p.scenario_id
+            ),
         )
         for p in default_plan_models
     ]