diff --git a/scripts/run_modelling_e2e.py b/scripts/run_modelling_e2e.py
index 80a53db6..e38fdb63 100644
--- a/scripts/run_modelling_e2e.py
+++ b/scripts/run_modelling_e2e.py
@@ -20,7 +20,8 @@ band); without it the run synthesises an Increasing-EPC-to-``--goal`` Scenario.
 (mirroring the legacy `inclusions`) — e.g. only HHRSH + Solar PV.
 
 Config: loads `backend/.env` for the DB creds (`DB_*`), the EPC API token
-(`EPC_AUTH_TOKEN`), the Google Solar key (`GOOGLE_SOLAR_API_KEY`) and the S3
+(`OPEN_EPC_API_TOKEN` — the Bearer token for the new gov API), the Google Solar
+key (`GOOGLE_SOLAR_API_KEY`) and the S3
 reference bucket (`DATA_BUCKET`) — the agent never sees the secrets. AWS creds
 come from the ambient `~/.aws` profile. Run from the worktree root:
 
@@ -280,7 +281,10 @@ def main() -> None:
         parser.error("--persist requires --scenario-id and --portfolio-id")
 
     _load_env(_ENV_PATH)
-    epc_client = EpcClientService(os.environ["EPC_AUTH_TOKEN"])
+    # The new gov EPC API (Bearer) authenticates with OPEN_EPC_API_TOKEN — the
+    # name is misleading; EPC_AUTH_TOKEN is dead (403). Verified against the
+    # /api/domestic/search endpoint.
+    epc_client = EpcClientService(os.environ["OPEN_EPC_API_TOKEN"])
     geospatial = GeospatialS3Repository(_s3_parquet_reader(os.environ["DATA_BUCKET"]))
     solar_client = GoogleSolarApiClient(os.environ["GOOGLE_SOLAR_API_KEY"])
     engine = _engine()