diff --git a/model_data/epc_attributes/MainheatControlAttributes.py b/model_data/epc_attributes/MainheatControlAttributes.py
index 0c826775..0ad2cada 100644
--- a/model_data/epc_attributes/MainheatControlAttributes.py
+++ b/model_data/epc_attributes/MainheatControlAttributes.py
@@ -74,7 +74,8 @@ class MainheatControlAttributes(Definitions):
     }
 
     WELSH_TEXT = {
-        "rhaglennydd, dim thermostat ystafell": "programmer, no room thermostat"
+        "rhaglennydd, dim thermostat ystafell": "programmer, no room thermostat",
+        "rhaglennydd a thermostat ystafell": "programmer and room thermostat"
     }
 
     def __init__(self, description: str):
diff --git a/model_data/epc_attributes/RoofAttributes.py b/model_data/epc_attributes/RoofAttributes.py
index 9125b252..8d50db77 100644
--- a/model_data/epc_attributes/RoofAttributes.py
+++ b/model_data/epc_attributes/RoofAttributes.py
@@ -10,6 +10,7 @@ class RoofAttributes(Definitions):
 
     WELSH_TEXT = {
         "ar oleddf, dim inswleiddio": "pitched, no insulation",
+        "ar oleddf, dim inswleiddio (rhagdybiaeth)": "pitched, no insulation (assumed)",
         "(annedd arall uwchben)": "(another dwelling above)"
     }
 
diff --git a/model_data/tests/test_data/test_mainheat_control_attributes_cases.py b/model_data/tests/test_data/test_mainheat_control_attributes_cases.py
index 692049bf..c2f68eaa 100644
--- a/model_data/tests/test_data/test_mainheat_control_attributes_cases.py
+++ b/model_data/tests/test_data/test_mainheat_control_attributes_cases.py
@@ -136,5 +136,8 @@ mainheat_control_cases = [
      'thermostatic_control': 'room thermostat', 'charging_system': None,
      'switch_system': "programmer", 'no_control': None,
      'dhw_control': None, 'community_heating': None, 'multiple_room_thermostats': False, 'auxiliary_systems': None,
-     'trvs': None}
+     'trvs': None},
+    {'original_description': 'Rhaglennydd a thermostat ystafell', 'thermostatic_control': 'room thermostat',
+     'charging_system': None, 'switch_system': 'programmer', 'no_control': None, 'dhw_control': None,
+     'community_heating': None, 'multiple_room_thermostats': False, 'auxiliary_systems': None, 'trvs': None}
 ]
diff --git a/model_data/tests/test_data/test_roof_attributes_cases.py b/model_data/tests/test_data/test_roof_attributes_cases.py
index fabace6b..b7454eb3 100644
--- a/model_data/tests/test_data/test_roof_attributes_cases.py
+++ b/model_data/tests/test_data/test_roof_attributes_cases.py
@@ -349,5 +349,9 @@ clean_roof_test_cases = [
      'thermal_transmittance_unit': None,
      'is_pitched': True, 'is_roof_room': False, 'is_loft': False, 'is_flat': False, 'is_thatched': False,
      'is_at_rafters': False, 'is_assumed': False, 'has_dwelling_above': False, 'is_valid': True,
+     'insulation_thickness': 'none'},
+    {'original_description': 'Ar oleddf, dim inswleiddio (rhagdybiaeth)', 'thermal_transmittance': None,
+     'thermal_transmittance_unit': None, 'is_pitched': True, 'is_roof_room': False, 'is_loft': False, 'is_flat': False,
+     'is_thatched': False, 'is_at_rafters': False, 'is_assumed': True, 'has_dwelling_above': False, 'is_valid': True,
      'insulation_thickness': 'none'}
 ]