diff --git a/notebooks/qc-template.ipynb b/notebooks/qc-template.ipynb
index b549807..aa7ab5e 100644
--- a/notebooks/qc-template.ipynb
+++ b/notebooks/qc-template.ipynb
@@ -189,7 +189,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.10.12"
   }
  },
  "nbformat": 4,
diff --git a/sc2ts/utils.py b/sc2ts/utils.py
index 0e4f4ce..0752ce9 100644
--- a/sc2ts/utils.py
+++ b/sc2ts/utils.py
@@ -319,11 +319,9 @@ def max_descendant_samples(ts, show_progress=True):
 
 
 class TreeInfo:
-    def __init__(self, ts, show_progress=True, pango_source="Nextclade_pango"):
-        # Can current set pango_source to "Nextclade_pango" or "GISAID_lineage"
+    def __init__(self, ts, show_progress=True, pango_source="Viridian_pangolin"):
         self.ts = ts
         self.pango_source = pango_source
-        self.epi_isl_map = {}
         self.strain_map = {}
         self.recombinants = get_recombinants(ts)
         self.nodes_max_descendant_samples = max_descendant_samples(ts)
@@ -348,10 +346,6 @@ def __init__(self, ts, show_progress=True, pango_source="Nextclade_pango"):
             md = node.metadata
             self.nodes_metadata[node.id] = md
             if node.is_sample():
-                self.epi_isl_map[md["gisaid_epi_isl"]] = node.id
-                if md["gisaid_epi_isl"] is not None:
-                    if "." in md["gisaid_epi_isl"]:
-                        self.epi_isl_map[md["gisaid_epi_isl"].split(".")[0]] = node.id
                 self.strain_map[md["strain"]] = node.id
                 self.nodes_date[node.id] = md["date"]
                 self.nodes_submission_date[node.id] = md["date_submitted"]
@@ -1036,11 +1030,9 @@ def _mutation_summary(self, mut_id):
             "metadata": self.ts.mutation(mut_id).metadata,
         }
 
-    def node_report(self, node_id=None, strain=None, epi_isl=None):
+    def node_report(self, node_id=None, strain=None):
         if strain is not None:
             node_id = self.strain_map[strain]
-        if epi_isl is not None:
-            node_id = self.epi_isl_map[epi_isl]
         # node_summary = pd.DataFrame([self._node_summary(node_id)])
         # TODO improve this for internal nodes
         node_summary = [self.ts.node(node_id).metadata]
@@ -2021,6 +2013,8 @@ def add_gisaid_lineages_to_ts(ts, node_gisaid_lineages, linmuts_dict):
     return edited_ts
 
 
+# NOTE: this is broken since moving to Viridian metadata, we no longer have 
+# GISAID EPI ISL in the metadata
 def check_lineages(
     ts,
     ti,