diff --git a/model_data/epc_attributes/attribute_utils.py b/model_data/epc_attributes/attribute_utils.py
index a1b65327..e560f8b0 100644
--- a/model_data/epc_attributes/attribute_utils.py
+++ b/model_data/epc_attributes/attribute_utils.py
@@ -2,8 +2,9 @@ import re
 import string
 from typing import Tuple, Union, Dict, List
 
-THERMAL_TRANSMITTENCE_STR = r"average thermal transmittance (-?\d+\.\d+)\s(w/m-¦k)"
-THERMAL_TRANSMITTANCE_REGEX = re.compile(THERMAL_TRANSMITTENCE_STR)
+THERMAL_TRANSMITTANCE_STR = r"average thermal transmittance (-?\d+\.\d+)\s(w/m\S+k)"
+THERMAL_TRANSMITTANCE_REGEX = re.compile(THERMAL_TRANSMITTANCE_STR)
+
 DOUBLE_SPACE_PATTERN = re.compile(r"\s+")
 
 
@@ -20,11 +21,12 @@ def extract_thermal_transmittance(result: dict, description: str) -> Tuple[
     """
 
     match = THERMAL_TRANSMITTANCE_REGEX.search(description)
+
     if match:
         result['thermal_transmittance'] = float(match.group(1))
         result['thermal_transmittance_unit'] = match.group(2)
         # Remove the match from the description
-        description = re.sub(THERMAL_TRANSMITTENCE_STR, "", description)
+        description = re.sub(THERMAL_TRANSMITTANCE_STR, "", description)
     else:
         result['thermal_transmittance'] = None
         result['thermal_transmittance_unit'] = None
diff --git a/model_data/tests/test_data/test_wall_attributes_cases.py b/model_data/tests/test_data/test_wall_attributes_cases.py
index 162ebc1f..54b37c39 100644
--- a/model_data/tests/test_data/test_wall_attributes_cases.py
+++ b/model_data/tests/test_data/test_wall_attributes_cases.py
@@ -690,5 +690,11 @@ wall_cases = [
      'thermal_transmittance_unit': None, 'is_cavity_wall': False, 'is_filled_cavity': False, 'is_solid_brick': True,
      'is_system_built': False, 'is_timber_frame': False, 'is_granite_or_whinstone': False, 'is_as_built': True,
      'is_cob': False, 'is_assumed': True, 'is_sandstone_or_limestone': False, 'insulation_thickness': 'none',
-     'external_insulation': False, 'internal_insulation': False}
+     'external_insulation': False, 'internal_insulation': False},
+    {'original_description': 'Average thermal transmittance 1.60 W/m+é-¦K',
+     'thermal_transmittance': 1.6, 'thermal_transmittance_unit': 'w/m+é-¦k', 'is_cavity_wall': False,
+     'is_filled_cavity': False, 'is_solid_brick': False, 'is_system_built': False, 'is_timber_frame': False,
+     'is_granite_or_whinstone': False, 'is_as_built': False, 'is_cob': False, 'is_assumed': False,
+     'is_sandstone_or_limestone': False, 'insulation_thickness': None, 'external_insulation': False,
+     'internal_insulation': False}
 ]