PolicyEngine · MaxGhenis · May 20, 2026 · May 20, 2026 · May 20, 2026 · May 20, 2026
diff --git a/changelog.d/update-uk-fuel-duty-bundle.changed.md b/changelog.d/update-uk-fuel-duty-bundle.changed.md
@@ -0,0 +1 @@
+Update the bundled UK release to calibrated fuel-duty litres.
diff --git a/pyproject.toml b/pyproject.toml
@@ -43,7 +43,7 @@ graph = [
 ]
 uk = [
     "policyengine_core>=3.26.1",
-    "policyengine-uk==2.88.14",
+    "policyengine-uk==2.88.20",
 ]
 us = [
     "policyengine_core==3.26.1",
@@ -61,7 +61,7 @@ dev = [
     "pytest-asyncio>=0.26.0",
     "ruff>=0.9.0",
     "policyengine_core==3.26.1",
-    "policyengine-uk==2.88.14",
+    "policyengine-uk==2.88.20",
     "policyengine-us==1.700.0",
     "towncrier>=24.8.0",
     "mypy>=1.11.0",

diff --git a/src/policyengine/data/release_manifests/uk.json b/src/policyengine/data/release_manifests/uk.json
@@ -5,39 +5,44 @@
   "policyengine_version": "4.9.1",
   "model_package": {
     "name": "policyengine-uk",
-    "version": "2.88.14",
-    "sha256": "ed10005ba7d0c973c0966ebbf7672853fb3caaa0456b8bf485fb13f8c323d975",
-    "wheel_url": "https://files.pythonhosted.org/packages/a3/fc/276fb639a46bda35523329d8968bcc4089fde9e97fab82722c0ec853c6cc/policyengine_uk-2.88.14-py3-none-any.whl"
+    "version": "2.88.20",
+    "sha256": "8c3dacb868f3fb18296b8ef2475edaf543f57b8056d24a58bca59b108651f272",
+    "wheel_url": "https://files.pythonhosted.org/packages/32/f0/c0e7dbcc049501dc968da0a67de4976f305228328f96fe0ad08c65301c4f/policyengine_uk-2.88.20-py3-none-any.whl"
   },
   "data_package": {
     "name": "policyengine-uk-data",
-    "version": "1.55.5",
-    "repo_id": "policyengine/policyengine-uk-data-private"
+    "version": "1.55.10",
+    "repo_id": "policyengine/policyengine-uk-data-private",
+    "release_manifest_path": "release_manifest.json",
+    "release_manifest_revision": "655dd07e4bb9c777b00dac044949611f1feb824f"
   },
   "certified_data_artifact": {
     "data_package": {
       "name": "policyengine-uk-data",
-      "version": "1.55.5"
+      "version": "1.55.10"
     },
-    "build_id": "policyengine-uk-data-1.55.5",
+    "build_id": "policyengine-uk-data-1.55.10",
     "dataset": "enhanced_frs_2023_24",
-    "uri": "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@1.55.5"
+    "uri": "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f",
+    "sha256": "584ae33d80ca0431254610a3f8254d132da73477d31966d6446282861ecae50d"
   },
   "certification": {
-    "compatibility_basis": "matching_data_build_fingerprint",
-    "data_build_id": "policyengine-uk-data-1.55.5",
-    "built_with_model_version": "2.88.14",
-    "certified_for_model_version": "2.88.14",
-    "data_build_fingerprint": "sha256:dff5c5bb976ce254fa965ecfce6a0d84859fe1629a714ae28a79b3075522a0ae",
+    "compatibility_basis": "exact_build_model_version",
+    "data_build_id": "policyengine-uk-data-1.55.10",
+    "built_with_model_version": "2.88.20",
+    "certified_for_model_version": "2.88.20",
+    "data_build_fingerprint": "sha256:77f149725a36055fd89961855230401852b0712d301c6e26d6d16565c6b23809",
     "certified_by": "policyengine.py bundled manifest"
   },
   "default_dataset": "enhanced_frs_2023_24",
   "datasets": {
     "frs_2023_24": {
-      "path": "frs_2023_24.h5"
+      "path": "frs_2023_24.h5",
+      "sha256": "df26d4d7af9d164aa2d064181b39290292d2f62bb26fee6126fc095fc06da292"
     },
     "enhanced_frs_2023_24": {
-      "path": "enhanced_frs_2023_24.h5"
+      "path": "enhanced_frs_2023_24.h5",
+      "sha256": "584ae33d80ca0431254610a3f8254d132da73477d31966d6446282861ecae50d"
     }
   },
   "region_datasets": {

diff --git a/src/policyengine/data/release_manifests/uk.trace.tro.jsonld b/src/policyengine/data/release_manifests/uk.trace.tro.jsonld
@@ -17,7 +17,7 @@
         "schema:name": "PolicyEngine",
         "schema:url": "https://policyengine.org"
       },
-      "schema:dateCreated": "2026-05-09T07:14:50.156352Z",
+      "schema:dateCreated": "2026-05-20T20:16:50.641086Z",
       "schema:description": "TRACE TRO for certified runtime bundle uk-4.9.1 covering the bundle manifest, the certified dataset artifact, the country model wheel, and the country data release manifest when it is available.",
       "schema:name": "policyengine uk certified bundle TRO",
       "trov:createdWith": {
@@ -45,23 +45,23 @@
               "trov:hasArtifact": {
                 "@id": "composition/1/artifact/data_release_manifest"
               },
-              "trov:hasLocation": "https://huggingface.co/policyengine/policyengine-uk-data-private/resolve/1.55.5/release_manifest.json"
+              "trov:hasLocation": "https://huggingface.co/policyengine/policyengine-uk-data-private/resolve/655dd07e4bb9c777b00dac044949611f1feb824f/release_manifest.json"
             },
             {
               "@id": "arrangement/1/location/dataset",
               "@type": "trov:ArtifactLocation",
               "trov:hasArtifact": {
                 "@id": "composition/1/artifact/dataset"
               },
-              "trov:hasLocation": "https://huggingface.co/policyengine/policyengine-uk-data-private/resolve/1.55.5/enhanced_frs_2023_24.h5"
+              "trov:hasLocation": "https://huggingface.co/policyengine/policyengine-uk-data-private/resolve/655dd07e4bb9c777b00dac044949611f1feb824f/enhanced_frs_2023_24.h5"
             },
             {
               "@id": "arrangement/1/location/model_wheel",
               "@type": "trov:ArtifactLocation",
               "trov:hasArtifact": {
                 "@id": "composition/1/artifact/model_wheel"
               },
-              "trov:hasLocation": "https://files.pythonhosted.org/packages/a3/fc/276fb639a46bda35523329d8968bcc4089fde9e97fab82722c0ec853c6cc/policyengine_uk-2.88.14-py3-none-any.whl"
+              "trov:hasLocation": "https://files.pythonhosted.org/packages/32/f0/c0e7dbcc049501dc968da0a67de4976f305228328f96fe0ad08c65301c4f/policyengine_uk-2.88.20-py3-none-any.whl"
             }
           ]
         }
@@ -75,54 +75,51 @@
             "@type": "trov:ResearchArtifact",
             "schema:name": "policyengine.py bundle manifest for uk",
             "trov:mimeType": "application/json",
-            "trov:sha256": "908c979b898aebd52b5017c1f1e75c4b45e4ab5673e2cb97a1dd666933013a48"
+            "trov:sha256": "fa72ac10d69302da0cf5ca55466badffc3c82f020a71c20daa4e2039ff37f4c2"
           },
           {
             "@id": "composition/1/artifact/data_release_manifest",
             "@type": "trov:ResearchArtifact",
-            "schema:name": "policyengine-uk-data release manifest 1.55.5",
+            "schema:name": "policyengine-uk-data release manifest 1.55.10",
             "trov:mimeType": "application/json",
-            "trov:sha256": "31de03e0bedc1ad29d5809fb16ca925f26485c86fc1b14bf911636ebb83863a4"
+            "trov:sha256": "9f41a0f14ca93d20e61d33419173c3fedc1c3ba295b6ca67dd3197a41643d179"
           },
           {
             "@id": "composition/1/artifact/dataset",
             "@type": "trov:ResearchArtifact",
             "schema:name": "enhanced_frs_2023_24",
             "trov:mimeType": "application/x-hdf5",
-            "trov:sha256": "1e95dafde7997a24dac1abc122f8e2ebbc8c2d7d36bab8361e628a93401559ce"
+            "trov:sha256": "584ae33d80ca0431254610a3f8254d132da73477d31966d6446282861ecae50d"
           },
           {
             "@id": "composition/1/artifact/model_wheel",
             "@type": "trov:ResearchArtifact",
-            "schema:name": "policyengine-uk==2.88.14 wheel",
+            "schema:name": "policyengine-uk==2.88.20 wheel",
             "trov:mimeType": "application/zip",
-            "trov:sha256": "ed10005ba7d0c973c0966ebbf7672853fb3caaa0456b8bf485fb13f8c323d975"
+            "trov:sha256": "8c3dacb868f3fb18296b8ef2475edaf543f57b8056d24a58bca59b108651f272"
           }
         ],
         "trov:hasFingerprint": {
           "@id": "composition/1/fingerprint",
           "@type": "trov:CompositionFingerprint",
-          "trov:sha256": "963655c8d38e59b8e71529ba4df0341ecdc9e620812fe86bddf555388311834c"
+          "trov:sha256": "fd1edf28ab87307b0db6aa3be98d3e72fba0ac9fff5372c6f9a17c7b0264e8be"
         }
       },
       "trov:hasPerformance": {
         "@id": "trp/1",
         "@type": "trov:TransparentResearchPerformance",
-        "pe:builtWithModelVersion": "2.88.14",
+        "pe:builtWithModelVersion": "2.88.20",
         "pe:certifiedBy": "policyengine.py bundled manifest",
-        "pe:certifiedForModelVersion": "2.88.14",
-        "pe:ciGitRef": "refs/heads/main",
-        "pe:ciGitSha": "4319e7143d99597ea5f22a14bdc5637196b2ddfb",
-        "pe:ciRunUrl": "https://github.com/PolicyEngine/policyengine.py/actions/runs/26188268595",
-        "pe:compatibilityBasis": "matching_data_build_fingerprint",
-        "pe:dataBuildFingerprint": "sha256:dff5c5bb976ce254fa965ecfce6a0d84859fe1629a714ae28a79b3075522a0ae",
-        "pe:dataBuildId": "policyengine-uk-data-1.55.5",
-        "pe:emittedIn": "github-actions",
-        "rdfs:comment": "Certification of build policyengine-uk-data-1.55.5 for policyengine-uk 2.88.14.",
+        "pe:certifiedForModelVersion": "2.88.20",
+        "pe:compatibilityBasis": "exact_build_model_version",
+        "pe:dataBuildFingerprint": "sha256:77f149725a36055fd89961855230401852b0712d301c6e26d6d16565c6b23809",
+        "pe:dataBuildId": "policyengine-uk-data-1.55.10",
+        "pe:emittedIn": "local",
+        "rdfs:comment": "Certification of build policyengine-uk-data-1.55.10 for policyengine-uk 2.88.20.",
         "trov:accessedArrangement": {
           "@id": "arrangement/1"
         },
-        "trov:startedAtTime": "2026-05-09T07:14:50.156352Z",
+        "trov:startedAtTime": "2026-05-20T20:16:50.641086Z",
         "trov:wasConductedBy": {
           "@id": "trs"
         }

diff --git a/tests/test_models.py b/tests/test_models.py
@@ -29,12 +29,12 @@ def test_has_release_manifest_metadata(self):
         assert uk_latest.release_manifest is not None
         assert uk_latest.release_manifest.country_id == "uk"
         assert uk_latest.model_package.name == "policyengine-uk"
-        assert uk_latest.model_package.version == "2.88.14"
+        assert uk_latest.model_package.version == "2.88.20"
         assert uk_latest.data_package.name == "policyengine-uk-data"
-        assert uk_latest.data_package.version == "1.55.5"
+        assert uk_latest.data_package.version == "1.55.10"
         assert (
             uk_latest.default_dataset_uri
-            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@1.55.5"
+            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f"
         )
 
     def test_has_hundreds_of_parameters(self):

diff --git a/tests/test_release_manifests.py b/tests/test_release_manifests.py
@@ -109,24 +109,24 @@ def test__given_uk_manifest__then_has_pinned_model_and_data_packages(self):
         assert manifest.country_id == "uk"
         assert manifest.policyengine_version == POLICYENGINE_VERSION
         assert manifest.model_package.name == "policyengine-uk"
-        assert manifest.model_package.version == "2.88.14"
+        assert manifest.model_package.version == "2.88.20"
         assert manifest.data_package.name == "policyengine-uk-data"
-        assert manifest.data_package.version == "1.55.5"
+        assert manifest.data_package.version == "1.55.10"
         assert (
             manifest.data_package.repo_id == "policyengine/policyengine-uk-data-private"
         )
         assert manifest.certified_data_artifact is not None
         assert (
-            manifest.certified_data_artifact.build_id == "policyengine-uk-data-1.55.5"
+            manifest.certified_data_artifact.build_id == "policyengine-uk-data-1.55.10"
         )
         assert manifest.certified_data_artifact.dataset == "enhanced_frs_2023_24"
         assert manifest.certification is not None
-        assert manifest.certification.data_build_id == "policyengine-uk-data-1.55.5"
-        assert manifest.certification.built_with_model_version == "2.88.14"
-        assert manifest.certification.certified_for_model_version == "2.88.14"
+        assert manifest.certification.data_build_id == "policyengine-uk-data-1.55.10"
+        assert manifest.certification.built_with_model_version == "2.88.20"
+        assert manifest.certification.certified_for_model_version == "2.88.20"
         assert (
             manifest.certification.data_build_fingerprint
-            == "sha256:dff5c5bb976ce254fa965ecfce6a0d84859fe1629a714ae28a79b3075522a0ae"
+            == "sha256:77f149725a36055fd89961855230401852b0712d301c6e26d6d16565c6b23809"
         )
 
     def test__given_us_dataset_name__then_resolves_to_versioned_hf_url(self):
@@ -157,7 +157,7 @@ def test__given_uk_dataset_name__then_resolves_to_versioned_hf_url(self):
 
         assert (
             resolved
-            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@1.55.5"
+            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f"
         )
 
     def test__given_explicit_url__then_resolution_is_noop(self):
@@ -612,9 +612,9 @@ def test__given_manifest_certification__then_release_bundle_exposes_it(self):
         assert bundle["bundle_id"] == f"uk-{POLICYENGINE_VERSION}"
         assert bundle["default_dataset"] == "enhanced_frs_2023_24"
         assert bundle["default_dataset_uri"] == manifest.default_dataset_uri
-        assert bundle["certified_data_build_id"] == "policyengine-uk-data-1.55.5"
-        assert bundle["data_build_model_version"] == "2.88.14"
-        assert bundle["compatibility_basis"] == "matching_data_build_fingerprint"
+        assert bundle["certified_data_build_id"] == "policyengine-uk-data-1.55.10"
+        assert bundle["data_build_model_version"] == "2.88.20"
+        assert bundle["compatibility_basis"] == "exact_build_model_version"
         assert bundle["certified_by"] == "policyengine.py bundled manifest"
 
     def test__given_runtime_certification__then_release_bundle_prefers_runtime_value(
@@ -694,19 +694,19 @@ def test__given_uk_managed_dataset_name__then_resolves_within_bundle(self):
         else:
             assert dataset == (
                 "hf://policyengine/policyengine-uk-data-private/"
-                "enhanced_frs_2023_24.h5@1.55.5"
+                "enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f"
             )
         assert (
             microsim.policyengine_bundle["policyengine_version"] == POLICYENGINE_VERSION
         )
         assert microsim.policyengine_bundle["runtime_dataset"] == "enhanced_frs_2023_24"
         assert microsim.policyengine_bundle["runtime_dataset_uri"] == (
-            "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@1.55.5"
+            "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f"
         )
         dataset_source = microsim.policyengine_bundle["runtime_dataset_source"]
         assert (
             dataset_source
-            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@1.55.5"
+            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f"
             or str(dataset_source).endswith(
                 "policyengine_uk_data/storage/enhanced_frs_2023_24.h5"
             )

diff --git a/tests/test_uk_regions.py b/tests/test_uk_regions.py
@@ -68,7 +68,7 @@ def test__given_uk_registry__then_has_national_region(self):
         assert national.region_type == "national"
         assert (
             national.dataset_path
-            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@1.55.5"
+            == "hf://policyengine/policyengine-uk-data-private/enhanced_frs_2023_24.h5@655dd07e4bb9c777b00dac044949611f1feb824f"
         )
         assert not national.requires_filter
 

diff --git a/uv.lock b/uv.lock
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Update the bundled UK release to calibrated fuel-duty litres.