diff --git a/_infra/helm/collection-exercise/Chart.yaml b/_infra/helm/collection-exercise/Chart.yaml
index 563a44ba9..8d8cded02 100644
--- a/_infra/helm/collection-exercise/Chart.yaml
+++ b/_infra/helm/collection-exercise/Chart.yaml
@@ -14,9 +14,9 @@ type: application
 
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
-version: 13.0.32
+version: 13.0.33
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application.
-appVersion: 13.0.32
+appVersion: 13.0.33
 
diff --git a/src/main/java/uk/gov/ons/ctp/response/collection/exercise/lib/party/representation/PartyDTO.java b/src/main/java/uk/gov/ons/ctp/response/collection/exercise/lib/party/representation/PartyDTO.java
deleted file mode 100644
index 4a3807f0d..000000000
--- a/src/main/java/uk/gov/ons/ctp/response/collection/exercise/lib/party/representation/PartyDTO.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package uk.gov.ons.ctp.response.collection.exercise.lib.party.representation;
-
-import com.fasterxml.jackson.annotation.JsonIgnore;
-import java.util.List;
-import lombok.AccessLevel;
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-
-@Data
-@AllArgsConstructor
-@NoArgsConstructor(access = AccessLevel.PUBLIC)
-public class PartyDTO {
-  private String id;
-  private String sampleUnitType;
-  private String sampleSummaryId;
-  private String sampleUnitRef;
-  private String name;
-  private Attributes attributes;
-  private List<Association> associations;
-
-  @JsonIgnore private String status; // required to cope with a BI response from PartySvc
-}
diff --git a/src/test/java/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.java b/src/test/java/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.java
index 998526e41..96d5e7cca 100644
--- a/src/test/java/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.java
+++ b/src/test/java/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.java
@@ -180,7 +180,6 @@ public void shouldTransitionCollectionExerciseToReadyToReviewOnSampleSummaryLink
     // Given
     stubSurveyServiceBusiness();
     stubCollectionInstrumentCount();
-    stubGetPartyBySampleUnitRef();
     SampleSummaryDTO sampleSummary = stubSampleSummary();
     UUID collectionExerciseId = createScheduledCollectionExercise();
 
@@ -199,7 +198,6 @@ public void shouldTransitionWhenToldSampleIsReady() throws Exception {
     // Given
     stubSurveyServiceBusiness();
     stubCollectionInstrumentCount();
-    stubGetPartyBySampleUnitRef();
     SampleSummaryDTO sampleSummary = stubSampleSummary();
     UUID collectionExerciseId = createScheduledCollectionExercise();
     this.client.linkSampleSummary(collectionExerciseId, sampleSummary.getId());
@@ -218,7 +216,6 @@ public void shouldNotTransitionWhenSampleIsNotReady() throws Exception {
     // Given
     stubSurveyServiceBusiness();
     stubCollectionInstrumentCount();
-    stubGetPartyBySampleUnitRef();
     SampleSummaryDTO sampleSummary = stubInitSampleSummary();
     UUID collectionExerciseId = createScheduledCollectionExercise();
     this.client.linkSampleSummary(collectionExerciseId, sampleSummary.getId());
@@ -332,46 +329,6 @@ private void stubCollectionInstrumentCount() throws IOException {
             .willReturn(aResponse().withBody("1")));
   }
 
-  private void stubGetPartyBySampleUnitRef() throws IOException {
-    String json =
-        loadResourceAsString(
-            CollectionExerciseEndpointIT.class,
-            "CollectionExerciseEndpointIT.PartyDTO.with-associations.json");
-    this.wireMockRule.stubFor(
-        get(urlPathMatching("/party-api/v1/businesses/ref/(.*)"))
-            .willReturn(aResponse().withHeader("Content-Type", "application/json").withBody(json)));
-  }
-
-  private void stubGetPartyNoAssociations() throws IOException {
-    String json =
-        loadResourceAsString(
-            CollectionExerciseEndpointIT.class,
-            "CollectionExerciseEndpointIT.PartyDTO.no-associations.json");
-    this.wireMockRule.stubFor(
-        get(urlPathMatching("/party-api/v1/businesses/ref/(.*)"))
-            .willReturn(aResponse().withHeader("Content-Type", "application/json").withBody(json)));
-  }
-
-  private void stubGetPartyWithAssociations() throws IOException {
-    String json =
-        loadResourceAsString(
-            CollectionExerciseEndpointIT.class,
-            "CollectionExerciseEndpointIT.Supplementary.with-associations.json");
-    this.wireMockRule.stubFor(
-        get(urlPathMatching("/party-api/v1/businesses/ref/(.*)"))
-            .willReturn(aResponse().withHeader("Content-Type", "application/json").withBody(json)));
-  }
-
-  private void stubGetSupplementaryDataServvice() throws IOException {
-    String json =
-        loadResourceAsString(
-            CollectionExerciseEndpointIT.class,
-            "CollectionExerciseEndpointIT.SupplementaryDatasetDTO.with-associations.json");
-    this.wireMockRule.stubFor(
-        get(urlPathMatching("/party-api/v1/businesses/ref/(.*)"))
-            .willReturn(aResponse().withHeader("Content-Type", "application/json").withBody(json)));
-  }
-
   private void createSurveyServiceClassifierStubs() throws IOException {
     String json =
         loadResourceAsString(
diff --git a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/distribution/SampleUnitDistributorTest.PartyDTO.json b/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/distribution/SampleUnitDistributorTest.PartyDTO.json
deleted file mode 100644
index 1e8321206..000000000
--- a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/distribution/SampleUnitDistributorTest.PartyDTO.json
+++ /dev/null
@@ -1,69 +0,0 @@
-[
-  {
-    "associations": [
-      {
-        "enrolments": [
-          {
-            "enrolmentStatus": "PENDING",
-            "name": "Business Register and Employment Survey",
-            "surveyId": "cb0711c3-0ac8-41d3-ae0e-567e5ea1ef87"
-          }
-        ],
-        "partyId": "4eed610a-39f7-437b-a37d-9de1f905cb39"
-      },
-      {
-        "enrolments": [
-          {
-            "enrolmentStatus": "ENABLED",
-            "name": "Business Register and Employment Survey",
-            "surveyId": "cb0711c3-0ac8-41d3-ae0e-567e5ea1ef87"
-          }
-        ],
-        "partyId": "e85f3aa9-1559-4406-956a-074d478cbcae"
-      },
-      {
-        "enrolments": [
-          {
-            "enrolmentStatus": "ENABLED",
-            "name": "Something Different Survey",
-            "surveyId": "cb0812d4-9df4-53r2-dr0y-568h5ea1xy99"
-          }
-        ],
-        "partyId": "8ed4caa4-4df5-42e2-93d1-7cd79a32786d"
-      }
-    ],
-    "attributes": {
-      "birthdate": "01/09/1993",
-      "cellNo": 1,
-      "checkletter": "A",
-      "currency": "H",
-      "entname1": "ENTNAME1",
-      "entname2": "ENTNAME2",
-      "entname3": "ENTNAME3",
-      "entref": "1234567890",
-      "entrepmkr": "C",
-      "formtype": "0001",
-      "froempment": 50,
-      "frosic2007": "11111",
-      "frosic92": "11111",
-      "frotover": 50,
-      "inclexcl": "G",
-      "legalstatus": "B",
-      "name": "Bolts and Ratchets Ltd",
-      "region": "DE",
-      "runame1": "Bolts",
-      "runame2": "and",
-      "runame3": "Ratchets Ltd",
-      "ruref": "49900000000",
-      "rusic2007": "11111",
-      "rusic92": "11111",
-      "seltype": "F",
-      "tradstyle1": "TRADSTYLE1",
-      "tradstyle2": "TRADSTYLE2",
-      "tradstyle3": "TRADSTYLE3"
-    },
-    "id": "45297c23-763d-46a9-b4e5-c37ff5b4fbe8",
-    "sampleUnitRef": "49900000000",
-    "sampleUnitType": "B"
-  }
-]
\ No newline at end of file
diff --git a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.PartyDTO.no-associations.json b/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.PartyDTO.no-associations.json
deleted file mode 100644
index 5cadcb22a..000000000
--- a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.PartyDTO.no-associations.json
+++ /dev/null
@@ -1,36 +0,0 @@
-{
-  "associations": [],
-  "attributes": {
-    "birthdate": "01/09/1993", 
-    "cellNo": 1, 
-    "checkletter": "A", 
-    "currency": "H", 
-    "entname1": "ENTNAME1", 
-    "entname2": "ENTNAME2", 
-    "entname3": "ENTNAME3", 
-    "entref": "1234567890", 
-    "entrepmkr": "C", 
-    "formtype": "0001", 
-    "froempment": 50, 
-    "frosic2007": "11111", 
-    "frosic92": "11111", 
-    "frotover": 50, 
-    "inclexcl": "G", 
-    "legalstatus": "B", 
-    "name": "Bolts and Ratchets Ltd", 
-    "region": "DE", 
-    "runame1": "Bolts", 
-    "runame2": "and", 
-    "runame3": "Ratchets Ltd", 
-    "ruref": "49900000000", 
-    "rusic2007": "11111", 
-    "rusic92": "11111", 
-    "seltype": "F", 
-    "tradstyle1": "TRADSTYLE1", 
-    "tradstyle2": "TRADSTYLE2", 
-    "tradstyle3": "TRADSTYLE3"
-  }, 
-  "id": "45297c23-763d-46a9-b4e5-c37ff5b4fbe8", 
-  "sampleUnitRef": "49900000000", 
-  "sampleUnitType": "B"
-}
diff --git a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.PartyDTO.with-associations.json b/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.PartyDTO.with-associations.json
deleted file mode 100644
index a1b6099c1..000000000
--- a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/endpoint/CollectionExerciseEndpointIT.PartyDTO.with-associations.json
+++ /dev/null
@@ -1,57 +0,0 @@
-{
-  "associations": [
-    {
-      "enrolments": [
-        {
-          "enrolmentStatus": "PENDING",
-          "name": "Test Survey",
-          "surveyId": "c23bb1c1-5202-43bb-8357-7a07c844308f"
-        }
-      ], 
-      "partyId": "4eed610a-39f7-437b-a37d-9de1f905cb39"
-    }, 
-    {
-      "enrolments": [
-        {
-          "enrolmentStatus": "ENABLED",
-          "name": "Test Survey",
-          "surveyId": "c23bb1c1-5202-43bb-8357-7a07c844308f"
-        }
-      ], 
-      "partyId": "4625df99-7c20-4610-a18c-2f93daffce2a"
-    }
-  ], 
-  "attributes": {
-    "birthdate": "01/09/1993", 
-    "cellNo": 1, 
-    "checkletter": "A", 
-    "currency": "H", 
-    "entname1": "ENTNAME1", 
-    "entname2": "ENTNAME2", 
-    "entname3": "ENTNAME3", 
-    "entref": "1234567890", 
-    "entrepmkr": "C", 
-    "formtype": "0001", 
-    "froempment": 50, 
-    "frosic2007": "11111", 
-    "frosic92": "11111", 
-    "frotover": 50, 
-    "inclexcl": "G", 
-    "legalstatus": "B", 
-    "name": "Bolts and Ratchets Ltd", 
-    "region": "DE", 
-    "runame1": "Bolts", 
-    "runame2": "and", 
-    "runame3": "Ratchets Ltd", 
-    "ruref": "49900000000", 
-    "rusic2007": "11111", 
-    "rusic92": "11111", 
-    "seltype": "F", 
-    "tradstyle1": "TRADSTYLE1", 
-    "tradstyle2": "TRADSTYLE2", 
-    "tradstyle3": "TRADSTYLE3"
-  }, 
-  "id": "45297c23-763d-46a9-b4e5-c37ff5b4fbe8", 
-  "sampleUnitRef": "49900000000", 
-  "sampleUnitType": "B"
-}
diff --git a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/service/ValidateSampleUnitsTest.PartyDTO.json b/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/service/ValidateSampleUnitsTest.PartyDTO.json
deleted file mode 100644
index 890ebbef1..000000000
--- a/src/test/resources/uk/gov/ons/ctp/response/collection/exercise/service/ValidateSampleUnitsTest.PartyDTO.json
+++ /dev/null
@@ -1,67 +0,0 @@
-{
-  "associations": [
-    {
-      "enrolments": [
-        {
-          "enrolmentStatus": "PENDING",
-          "name": "Business Register and Employment Survey", 
-          "surveyId": "cb0711c3-0ac8-41d3-ae0e-567e5ea1ef87"
-        }
-      ], 
-      "partyId": "4eed610a-39f7-437b-a37d-9de1f905cb39"
-    }, 
-    {
-      "enrolments": [
-        {
-          "enrolmentStatus": "ENABLED",
-          "name": "Business Register and Employment Survey", 
-          "surveyId": "cb0711c3-0ac8-41d3-ae0e-567e5ea1ef87"
-        }
-      ], 
-      "partyId": "4625df99-7c20-4610-a18c-2f93daffce2a"
-    }, 
-    {
-      "enrolments": [
-        {
-          "enrolmentStatus": "ENABLED",
-          "name": "Something Different Survey", 
-          "surveyId": "cb0812d4-9df4-53r2-dr0y-568h5ea1xy99"
-        }
-      ], 
-      "partyId": "8ed4caa4-4df5-42e2-93d1-7cd79a32786d"
-    }
-  ], 
-  "attributes": {
-    "birthdate": "01/09/1993", 
-    "cellNo": 1, 
-    "checkletter": "A", 
-    "currency": "H", 
-    "entname1": "ENTNAME1", 
-    "entname2": "ENTNAME2", 
-    "entname3": "ENTNAME3", 
-    "entref": "1234567890", 
-    "entrepmkr": "C", 
-    "formtype": "0001", 
-    "froempment": 50, 
-    "frosic2007": "11111", 
-    "frosic92": "11111", 
-    "frotover": 50, 
-    "inclexcl": "G", 
-    "legalstatus": "B", 
-    "name": "Bolts and Ratchets Ltd", 
-    "region": "DE", 
-    "runame1": "Bolts", 
-    "runame2": "and", 
-    "runame3": "Ratchets Ltd", 
-    "ruref": "49900000000", 
-    "rusic2007": "11111", 
-    "rusic92": "11111", 
-    "seltype": "F", 
-    "tradstyle1": "TRADSTYLE1", 
-    "tradstyle2": "TRADSTYLE2", 
-    "tradstyle3": "TRADSTYLE3"
-  }, 
-  "id": "45297c23-763d-46a9-b4e5-c37ff5b4fbe8", 
-  "sampleUnitRef": "49900000000", 
-  "sampleUnitType": "B"
-}