diff --git a/.mailmap b/.mailmap
index 4a4ca333f4..ca636e36af 100644
--- a/.mailmap
+++ b/.mailmap
@@ -29,6 +29,7 @@ Meabh NicGuidhir <meabh.nicguidhir@metoffice.gov.uk> <meabh.nicguidhir@metoffice
 Neil Crosswaite <neil.crosswaite@metoffice.gov.uk> <43375279+neilCrosswaite@users.noreply.github.com>
 Paul Abernethy <paul.abernethy@metoffice.gov.uk> <paul.abernethy@metoffice.gov.uk>
 Peter Jordan <peter.jordan@metoffice.gov.uk> <52462411+mo-peterjordan@users.noreply.github.com>
+Phoebe Lambert <phoebe.lambert@metoffice.gov.uk> <phoebe.lambert@metoffice.gov.uk>
 Sam Griffiths <sam.griffiths@metoffice.gov.uk> <122271903+SamGriffithsMO@users.noreply.github.com>
 Shafiat Dewan <87321907+ShafiatDewan@users.noreply.github.com> <87321907+ShafiatDewan@users.noreply.github.com>
 Shubhendra Singh Chauhan <withshubh@gmail.com> <withshubh@gmail.com>
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8dd2566698..9e8f748d1d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -59,6 +59,7 @@ below:
  - Caroline Jones (Met Office, UK)
  - Peter Jordan (Met Office, UK)
  - Bruno P. Kinoshita (NIWA, NZ)
+ - Phoebe Lambert (Met Office, UK)
  - Lucy Liu (Bureau of Meteorology, Australia)
  - Daniel Mentiplay (Bureau of Meteorology, Australia)
  - Stephen Moseley (Met Office, UK)
diff --git a/improver/standardise.py b/improver/standardise.py
index d1a655a964..4937fea071 100644
--- a/improver/standardise.py
+++ b/improver/standardise.py
@@ -236,6 +236,15 @@ def _discard_redundant_cell_methods(cube: Cube) -> None:
 
         cube.cell_methods = updated_cms
 
+    @staticmethod
+    def _remove_long_name_if_standard_name(cube: Cube) -> None:
+        """
+        Remove the long_name attribute from cubes if the cube also has a standard_name defined
+        """
+
+        if cube.standard_name and cube.long_name:
+            cube.long_name = None
+
     def process(self, cube: Cube) -> Cube:
         """
         Perform compulsory and user-configurable metadata adjustments.  The
@@ -269,6 +278,7 @@ def process(self, cube: Cube) -> Cube:
         if self._attributes_dict:
             amend_attributes(cube, self._attributes_dict)
         self._discard_redundant_cell_methods(cube)
+        self._remove_long_name_if_standard_name(cube)
 
         # this must be done after unit conversion as if the input is an integer
         # field, unit conversion outputs the new data as float64
diff --git a/improver_tests/standardise/test_StandardiseMetadata.py b/improver_tests/standardise/test_StandardiseMetadata.py
index a54f45113b..971b1f33b3 100644
--- a/improver_tests/standardise/test_StandardiseMetadata.py
+++ b/improver_tests/standardise/test_StandardiseMetadata.py
@@ -292,6 +292,14 @@ def test_air_temperature_status_flag_coord_without_realization(self):
         self.assertArrayEqual(result.data, target.data)
         self.assertEqual(result.coords(), target.coords())
 
+    def test_long_name_removed(self):
+        cube = self.cube.copy()
+        cube.long_name = "kittens"
+        result = StandardiseMetadata().process(cube)
+        assert (
+            result.long_name is None
+        ), "long_name removal expected, but long_name is not None"
+
 
 if __name__ == "__main__":
     unittest.main()