diff --git a/src/main/java/org/orph2020/pst/apiimpl/rest/AllocatedProposalResource.java b/src/main/java/org/orph2020/pst/apiimpl/rest/AllocatedProposalResource.java
index c03f088..c7fb1d9 100644
--- a/src/main/java/org/orph2020/pst/apiimpl/rest/AllocatedProposalResource.java
+++ b/src/main/java/org/orph2020/pst/apiimpl/rest/AllocatedProposalResource.java
@@ -3,6 +3,7 @@
 import jakarta.transaction.Transactional;
 import jakarta.ws.rs.*;
 import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.Response;
 import org.eclipse.microprofile.openapi.annotations.Operation;
 import org.eclipse.microprofile.openapi.annotations.tags.Tag;
 import org.ivoa.dm.proposal.management.AllocatedProposal;
@@ -46,7 +47,7 @@ public AllocatedProposal getAllocatedProposal(@PathParam("cycleCode") Long cycle
 
 
     @PUT
-    @Operation(summary = "upgrade a proposal under review to an allocated proposal")
+    @Operation(summary = "upgrade a submitted proposal to an allocated proposal")
     @Consumes(MediaType.TEXT_PLAIN)
     @Transactional(rollbackOn = {WebApplicationException.class})
     public ProposalSynopsis allocateProposalToCycle(@PathParam("cycleCode") Long cycleCode,
@@ -54,8 +55,15 @@ public ProposalSynopsis allocateProposalToCycle(@PathParam("cycleCode") Long cyc
             throws WebApplicationException
     {
         AllocatedProposal allocatedProposal = new AllocatedProposal(
-                findChildByQuery(ProposalCycle.class, SubmittedProposal.class,
-                        "submittedProposals", cycleCode, submittedId),new ArrayList<>());
+                findChildByQuery(
+                        ProposalCycle.class,
+                        SubmittedProposal.class,
+                        "submittedProposals",
+                        cycleCode,
+                        submittedId
+                ),
+                new ArrayList<>() //empty allocations list to be added to later
+        );
 
         ProposalCycle cycle = findObject(ProposalCycle.class, cycleCode);
 
@@ -66,6 +74,32 @@ public ProposalSynopsis allocateProposalToCycle(@PathParam("cycleCode") Long cyc
         return new ProposalSynopsis(allocatedProposal.getSubmitted());
     }
 
+    //TODO: make this callable by a 'TAC Chair' user only
+    @DELETE
+    @Path("{allocatedId}")
+    @Operation(summary = "withdraw a previously allocated proposal from the cycle")
+    @Transactional(rollbackOn = {WebApplicationException.class})
+    public Response withdrawAllocatedProposal(@PathParam("cycleCode") Long cycleCode,
+                                              @PathParam("allocatedId") Long allocatedId)
+    throws WebApplicationException {
+
+        ProposalCycle cycle = findObject(ProposalCycle.class, cycleCode);
+
+        AllocatedProposal allocatedProposal = findChildByQuery(
+                ProposalCycle.class,
+                AllocatedProposal.class,
+                "allocatedProposals",
+                cycleCode,
+                allocatedId
+        );
+
+        cycle.removeFromAllocatedProposals(allocatedProposal);
+
+        em.merge(cycle);
+
+        return Response.noContent().build();
+    }
+
 
 
 
diff --git a/src/test/java/org/orph2020/pst/apiimpl/rest/UseCaseTacChairTest.java b/src/test/java/org/orph2020/pst/apiimpl/rest/UseCaseTacChairTest.java
index 2084ae8..da19c84 100644
--- a/src/test/java/org/orph2020/pst/apiimpl/rest/UseCaseTacChairTest.java
+++ b/src/test/java/org/orph2020/pst/apiimpl/rest/UseCaseTacChairTest.java
@@ -13,9 +13,7 @@
 import org.junit.jupiter.api.Test;
 
 import jakarta.inject.Inject;
-
-import java.util.Calendar;
-import java.util.Date;
+import java.util.List;
 
 import static io.restassured.RestAssured.given;
 import static io.restassured.http.ContentType.JSON;
@@ -46,9 +44,7 @@ void setup(){
                   "$.size()", greaterThanOrEqualTo(1)
             )
             .extract().jsonPath().getLong("[0].dbid");
-      raObjectMapper = new Jackson2Mapper(((type, charset) -> {
-         return mapper;
-      }));
+      raObjectMapper = new Jackson2Mapper(((type, charset) -> mapper));
 
       TAC tac =
             given()
@@ -87,7 +83,7 @@ void reviewProposal() throws JsonProcessingException {
             .extract().jsonPath().getLong("[0].dbid");
 
       // the TAC member gets a proposal for review
-      SubmittedProposal revprop = given()
+      given()
             .when()
             .get("proposalCycles/" + cycleId + "/submittedProposals/" + revId)
             .then()
@@ -142,7 +138,7 @@ void allocateProposal() throws JsonProcessingException {
 
       //Create a new AllocatedBlock
       //IMPL have chosen the first of everything here - in GUI each will be a list.
-      Integer gradeId = given()
+      int gradeId = given()
               .when()
               .get("proposalCycles/" + cycleId + "/grades")
               .then()
@@ -161,7 +157,7 @@ void allocateProposal() throws JsonProcessingException {
 
 
 
-      Integer resourceTypeId = given()
+      int resourceTypeId = given()
               .when()
               .get("proposalCycles/" + cycleId + "/availableResources/types" )
               .then()
@@ -186,13 +182,20 @@ void allocateProposal() throws JsonProcessingException {
             }
       );
 
-      Integer allocatedId = given()
+      int allocatedId = given()
               .when()
               .get("proposalCycles/" + cycleId + "/allocatedProposals")
               .then()
               .body("$.size()", greaterThan(0))
               .extract().jsonPath().getInt("[0].dbid");
 
+      int allocationsSize = given()
+              .when()
+              .get("proposalCycles/" + cycleId + "/allocatedProposals")
+              .then()
+              .body("$.size()", greaterThan(0))
+              .extract().as(List.class).size();
+
       given()
               .when()
               .body(mapper.writeValueAsString(allocatedBlock))
@@ -201,6 +204,20 @@ void allocateProposal() throws JsonProcessingException {
               .then()
               .statusCode(200);
 
+      //test remove the allocated proposal
+      given()
+              .when()
+              .delete("proposalCycles/" + cycleId + "/allocatedProposals/" + allocatedId)
+              .then()
+              .statusCode(204);
+
+      //check the list of allocated proposals; should now one fewer than before
+      given()
+              .when()
+              .get("proposalCycles/" + cycleId + "/allocatedProposals")
+              .then()
+              .body("$.size()", equalTo(allocationsSize - 1));
+
    }
 
 }