diff --git a/benchmarks/benchmarks/__init__.py b/benchmarks/benchmarks/__init__.py
index 1eccf6478f..f3dd8995c6 100644
--- a/benchmarks/benchmarks/__init__.py
+++ b/benchmarks/benchmarks/__init__.py
@@ -71,8 +71,8 @@ class TrackAddedMemoryAllocation:
 
     """
 
-    RESULT_MINIMUM_MB = 1.0
-    RESULT_ROUND_DP = 1
+    RESULT_MINIMUM_MB = 0.2
+    RESULT_ROUND_DP = 1  # I.E. to nearest 0.1 Mb
 
     def __enter__(self):
         tracemalloc.start()
diff --git a/benchmarks/benchmarks/experimental/ugrid/regions_combine.py b/benchmarks/benchmarks/experimental/ugrid/regions_combine.py
index 409d6961c3..e74b2f2066 100644
--- a/benchmarks/benchmarks/experimental/ugrid/regions_combine.py
+++ b/benchmarks/benchmarks/experimental/ugrid/regions_combine.py
@@ -18,7 +18,7 @@
 from iris.experimental.ugrid import PARSE_UGRID_ON_LOAD
 from iris.experimental.ugrid.utils import recombine_submeshes
 
-from ... import TrackAddedMemoryAllocation, on_demand_benchmark
+from ... import TrackAddedMemoryAllocation
 from ...generate_data.ugrid import make_cube_like_2d_cubesphere
 
 
@@ -182,8 +182,6 @@ class CombineRegionsComputeRealData(MixinCombineRegions):
     def time_compute_data(self, n_cubesphere):
         _ = self.recombined_cube.data
 
-    # Vulnerable to noise, so disabled by default.
-    @on_demand_benchmark
     @TrackAddedMemoryAllocation.decorator
     def track_addedmem_compute_data(self, n_cubesphere):
         _ = self.recombined_cube.data
@@ -203,8 +201,6 @@ def time_save(self, n_cubesphere):
         # Save to disk, which must compute data + stream it to file.
         save(self.recombined_cube, "tmp.nc")
 
-    # Vulnerable to noise, so disabled by default.
-    @on_demand_benchmark
     @TrackAddedMemoryAllocation.decorator
     def track_addedmem_save(self, n_cubesphere):
         save(self.recombined_cube, "tmp.nc")
@@ -233,8 +229,6 @@ def time_stream_file2file(self, n_cubesphere):
         # Save to disk, which must compute data + stream it to file.
         save(self.recombined_cube, "tmp.nc")
 
-    # Vulnerable to noise, so disabled by default.
-    @on_demand_benchmark
     @TrackAddedMemoryAllocation.decorator
     def track_addedmem_stream_file2file(self, n_cubesphere):
         save(self.recombined_cube, "tmp.nc")
diff --git a/benchmarks/benchmarks/save.py b/benchmarks/benchmarks/save.py
index 9936331621..f78734835d 100644
--- a/benchmarks/benchmarks/save.py
+++ b/benchmarks/benchmarks/save.py
@@ -38,8 +38,6 @@ def time_netcdf_save_mesh(self, n_cubesphere, is_unstructured):
         if is_unstructured:
             self._save_mesh(self.cube)
 
-    # Vulnerable to noise, so disabled by default.
-    @on_demand_benchmark
     @TrackAddedMemoryAllocation.decorator
     def track_addedmem_netcdf_save(self, n_cubesphere, is_unstructured):
         # Don't need to copy the cube here since track_ benchmarks don't