diff --git a/mip_convert/mip_convert/tests/test_functional/test_functional_cmip7/test_cmip7_day_mmraerh2o_tavg-h2m-hxy-u.py b/mip_convert/mip_convert/tests/test_functional/test_functional_cmip7/test_cmip7_day_mmraerh2o_tavg-h2m-hxy-u.py
new file mode 100644
index 000000000..924ac36b4
--- /dev/null
+++ b/mip_convert/mip_convert/tests/test_functional/test_functional_cmip7/test_cmip7_day_mmraerh2o_tavg-h2m-hxy-u.py
@@ -0,0 +1,58 @@
+# (C) British Crown Copyright 2022-2026, Met Office.
+# Please see LICENSE.md for license details.
+import os
+
+import pytest
+
+from mip_convert.tests.test_functional.test_command_line import AbstractFunctionalTests
+from mip_convert.tests.test_functional.utils.configurations import Cmip7TestData, SpecificInfo
+from mip_convert.tests.test_functional.utils.directories import (get_cmor_log, get_output_dir,
+                                                                 MODEL_OUTPUT_DIR,
+                                                                 ROOT_OUTPUT_CASES_DIR)
+
+
+class TestCmip7_mmraerh2o_tavg_h2m_hxy_u(AbstractFunctionalTests):
+
+    def get_test_data(self):
+        test_location = os.path.join(ROOT_OUTPUT_CASES_DIR, 'test_CMIP7_aerosol_mmraerh2o_tavg-h2m-hxy-u')
+        return Cmip7TestData(
+            mip_table='aerosol',
+            variables=['mmraerh2o_tavg-h2m-hxy-u'],
+            specific_info=SpecificInfo(
+                common={
+                    'test_location': test_location},
+                cmor_setup={
+                    'cmor_log_file': get_cmor_log(test_location)
+                },
+                cmor_dataset={
+                    'output_dir': get_output_dir(test_location),
+                    'calendar': 'standard',
+                    'branch_date_in_child': "1850-01-01T00:00:00",
+                    'branch_date_in_parent': "1850-01-01T00:00:00",
+                    'model_id': 'UKCM2-0-LL',
+                    'variant_label': 'r2i1p1f1',
+                    'parent_model_id': 'UKCM2-0-LL'
+                },
+                request={
+                    'model_output_dir': MODEL_OUTPUT_DIR,
+                    'run_bounds': '1900-01-01T00:00:00 1900-02-01T00:00:00',
+                    'suite_id': 'u-dv623',
+                    'mip_convert_plugin': 'UKCM2'
+                },
+                streams={
+                    'ap6': {'CMIP7_aerosol@day': 'mmraerh2o_tavg-h2m-hxy-u'}
+                },
+                other={
+                    'reference_version': 'v1',
+                        'filenames': [
+                            'mmraerh2o_tavg-h2m-hxy-u_day_glb_g100_UKCM2-0-LL_1pctCO2_r2i1p1f1_19000101-19000131.nc'
+                        ],
+                    'ignore_history': True,
+                }
+            )
+        )
+
+    @pytest.mark.slow
+    def test_cmip7_day_mmraerh2o(self):
+        self.maxDiff = True
+        self.check_convert(plugin_id="CMIP7")
diff --git a/mip_convert/mip_convert/tests/test_process/test_processors.py b/mip_convert/mip_convert/tests/test_process/test_processors.py
index 9d4d48403..1ff9715f1 100644
--- a/mip_convert/mip_convert/tests/test_process/test_processors.py
+++ b/mip_convert/mip_convert/tests/test_process/test_processors.py
@@ -18,8 +18,9 @@
 from mip_convert.plugins.base.data.processors import (
     area_mean, areacella, calc_rho_mean, calc_zostoga, combine_cubes_to_basin_coord, eos_insitu, fix_clmisr_height,
     land_class_area, land_class_mean, level_sum, mask_copy, mask_zeros, mask_polar_column_zonal_means,
-    mon_mean_from_day, ocean_quasi_barotropic_streamfunc, tile_ids_for_class, volcello, vortmean,
-    annual_from_monthly_2d, annual_from_monthly_3d, calculate_thkcello_weights, check_data_is_monthly)
+    mon_mean_from_day, ocean_quasi_barotropic_streamfunc, replace_altitude_with_height2m, tile_ids_for_class,
+    remove_altitude_coords, volcello, vortmean, annual_from_monthly_2d, annual_from_monthly_3d, calculate_thkcello_weights,
+    check_data_is_monthly)
 from mip_convert.tests.common import dummy_cube
 from functools import reduce
 
@@ -45,6 +46,16 @@ def _cube_with_tbounds(bounds, unit=_DEFAULT_UNIT):
                 dim_coords_and_dims=[(times, 0)])
 
 
+def _cube_with_surface_altitude():
+    """Return a minimal cube with a 2D surface_altitude aux coord."""
+    lat = DimCoord([0.], long_name='lat')
+    lon = DimCoord([0.], long_name='lon')
+    surface_altitude = AuxCoord(np.zeros((1, 1)), standard_name='surface_altitude')
+    cube = Cube(np.ones((1, 1)), dim_coords_and_dims=[(lat, 0), (lon, 1)])
+    cube.add_aux_coord(surface_altitude, (0, 1))
+    return cube
+
+
 class TestMonMeanFromDay(unittest.TestCase):
 
     def _assert_value_error(self, cube, err_msg):
@@ -985,5 +996,33 @@ def test_test_annual_cube(self):
         np.testing.assert_array_almost_equal(result.data, expected, decimal=12)
 
 
+class TestReplaceAltitudeWithHeight2m(unittest.TestCase):
+
+    def setUp(self):
+        self.cube = _cube_with_surface_altitude()
+
+    def test_surface_altitude_coord_is_removed(self):
+        result = replace_altitude_with_height2m(self.cube)
+        coord_names = [c.name() for c in result.coords()]
+        self.assertNotIn('surface_altitude', coord_names)
+
+    def test_height2m_scalar_coord_is_added(self):
+        result = replace_altitude_with_height2m(self.cube)
+        height_coord = result.coord('height')
+        self.assertEqual(height_coord.points[0], np.float32(2.0))
+        self.assertEqual(str(height_coord.units), 'm')
+
+
+class TestRemoveAltitudeCoords(unittest.TestCase):
+
+    def setUp(self):
+        self.cube = _cube_with_surface_altitude()
+
+    def test_surface_altitude_coord_is_removed(self):
+        result = remove_altitude_coords(self.cube)
+        coord_names = [c.name() for c in result.coords()]
+        self.assertNotIn('surface_altitude', coord_names)
+
+
 if __name__ == '__main__':
     unittest.main()