diff --git a/migrations/versions/0249_another_letter_org.py b/migrations/versions/0249_another_letter_org.py
new file mode 100644
index 000000000..e4423ede8
--- /dev/null
+++ b/migrations/versions/0249_another_letter_org.py
@@ -0,0 +1,35 @@
+"""empty message
+
+Revision ID: 0249_another_letter_org
+Revises: 0248_enable_choose_postage
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0249_another_letter_org'
+down_revision = '0248_enable_choose_postage'
+
+from alembic import op
+
+
+NEW_ORGANISATIONS = [
+    ('521', 'North Somerset Council', 'north-somerset'),
+]
+
+
+def upgrade():
+    for numeric_id, name, filename in NEW_ORGANISATIONS:
+        op.execute("""
+            INSERT
+                INTO dvla_organisation
+                VALUES ('{}', '{}', '{}')
+        """.format(numeric_id, name, filename))
+
+
+def downgrade():
+    for numeric_id, _, _ in NEW_ORGANISATIONS:
+        op.execute("""
+            DELETE
+                FROM dvla_organisation
+                WHERE id = '{}'
+        """.format(numeric_id))