diff --git a/db/migrations/20221115171256-create-training-request-table.ts b/db/migrations/20221115171256-create-training-request-table.ts
index 4d0f84e..233c52d 100644
--- a/db/migrations/20221115171256-create-training-request-table.ts
+++ b/db/migrations/20221115171256-create-training-request-table.ts
@@ -1,5 +1,7 @@
 import { DataType } from "sequelize-typescript";
-import { QueryInterface } from "sequelize";
+import { NonAttribute, QueryInterface, VIRTUAL } from "sequelize";
+import { TrainingRequest } from "../../src/models/TrainingRequest";
+import { TrainingStation } from "../../src/models/TrainingStation";
 
 export const TRAINING_REQUEST_TABLE_STATUS_TYPES = ["requested", "planned", "cancelled", "completed"] as const;
 
@@ -64,6 +66,9 @@ export const TRAINING_REQUEST_TABLE_ATTRIBUTES = {
         allowNull: false,
         defaultValue: "requested",
     },
+    number_in_queue: {
+        type: DataType.VIRTUAL(DataType.INTEGER),
+    },
     expires: {
         type: DataType.DATE,
         allowNull: false,
diff --git a/src/controllers/solo/SoloAdminController.ts b/src/controllers/solo/SoloAdminController.ts
index 5d69670..592eb54 100644
--- a/src/controllers/solo/SoloAdminController.ts
+++ b/src/controllers/solo/SoloAdminController.ts
@@ -7,7 +7,7 @@ import { User } from "../../models/User";
 import { EndorsementGroupsBelongsToUsers } from "../../models/through/EndorsementGroupsBelongsToUsers";
 import { TrainingSession } from "../../models/TrainingSession";
 import PermissionHelper from "../../utility/helper/PermissionHelper";
-import { createSolo as vateudCreateSolo } from "../../libraries/vateud/VateudCoreLibrary";
+import { createSolo as vateudCreateSolo, removeSolo as vateudRemoveSolo } from "../../libraries/vateud/VateudCoreLibrary";
 import { EndorsementGroup } from "../../models/EndorsementGroup";
 
 type CreateSoloRequestBody = {
@@ -58,7 +58,7 @@ async function createSolo(request: Request, response: Response, next: NextFuncti
                 id: Number(body.endorsement_group_id),
             },
         });
-        
+
         if (endorsementGroup) await vateudCreateSolo(solo, endorsementGroup);
 
         const returnUser = await User.findOne({
@@ -246,6 +246,12 @@ async function deleteSolo(request: Request, response: Response, next: NextFuncti
             return;
         }
 
+        const solo = await UserSolo.findOne({
+            where: {
+                id: body.solo_id,
+            },
+        });
+
         // 1. Delete all endorsements that are linked to the solo.
         await EndorsementGroupsBelongsToUsers.destroy({
             where: {
@@ -253,6 +259,9 @@ async function deleteSolo(request: Request, response: Response, next: NextFuncti
             },
         });
 
+        // 2. Delete the VATEUD Core Solo
+        if (solo) await vateudRemoveSolo(solo);
+
         await UserSolo.destroy({
             where: {
                 id: body.solo_id,
diff --git a/src/controllers/training-request/TrainingRequestController.ts b/src/controllers/training-request/TrainingRequestController.ts
index a3290e8..6e0fe6f 100644
--- a/src/controllers/training-request/TrainingRequestController.ts
+++ b/src/controllers/training-request/TrainingRequestController.ts
@@ -13,7 +13,12 @@ import { HttpStatusCode } from "axios";
  * @param response
  */
 async function create(request: Request, response: Response) {
-    const body = request.body as { course_id: number; training_type_id: number; comment?: string; training_station_id?: number };
+    const body = request.body as {
+        course_id: number;
+        training_type_id: number;
+        comment?: string;
+        training_station_id?: number;
+    };
     const user: User = response.locals.user;
 
     // const validation = ValidationHelper.validate([
@@ -102,6 +107,10 @@ async function getOpen(request: Request, response: Response) {
         include: [TrainingRequest.associations.training_type, TrainingRequest.associations.course],
     });
 
+    for (const trainingRequest of trainingRequests) {
+        await trainingRequest.appendNumberInQueue();
+    }
+
     response.send(trainingRequests);
 }
 
diff --git a/src/controllers/user/UserTrainingController.ts b/src/controllers/user/UserTrainingController.ts
index dbefed0..1cae916 100644
--- a/src/controllers/user/UserTrainingController.ts
+++ b/src/controllers/user/UserTrainingController.ts
@@ -71,6 +71,10 @@ async function getActiveRequestsByUUID(request: Request, response: Response) {
         include: [TrainingRequest.associations.training_type, TrainingRequest.associations.training_station],
     });
 
+    for (const trainingRequest of trainingRequests) {
+        await trainingRequest.appendNumberInQueue();
+    }
+
     response.send(
         trainingRequests.filter(t => {
             return t.status == "requested" || t.status == "planned";
diff --git a/src/libraries/vateud/VateudCoreLibrary.ts b/src/libraries/vateud/VateudCoreLibrary.ts
index 0878899..f701ef4 100644
--- a/src/libraries/vateud/VateudCoreLibrary.ts
+++ b/src/libraries/vateud/VateudCoreLibrary.ts
@@ -102,21 +102,23 @@ export async function createSolo(userSolo: UserSolo, endorsementGroup: Endorseme
 /**
  * Removes a solo.
  * On failure, it schedules a job which repeats the same request n times until it succeeds
- * @param soloInfo
  */
-async function removeSolo(soloInfo: VateudCoreSoloRemoveT) {
+export async function removeSolo(userSolo: UserSolo) {
     const res = await _send<VateudCoreSoloRemoveResponseT>({
-        endpoint: `/solo/${soloInfo.vateud_solo_id}`,
+        endpoint: `/solo/${userSolo.vateud_solo_id}`,
         method: "delete",
     });
+
+    if (!userSolo.vateud_solo_id) return;
+
     if (!res) {
         await JobLibrary.scheduleJob(JobTypeEnum.VATEUD_CORE, {
             type: VateudCoreTypeEnum.SOLO_REMOVE,
             method: "delete",
             data: {
                 solo_remove: {
-                    local_solo_id: soloInfo.local_solo_id,
-                    vateud_solo_id: soloInfo.vateud_solo_id,
+                    local_solo_id: userSolo.id,
+                    vateud_solo_id: userSolo.vateud_solo_id,
                 },
             },
         });
diff --git a/src/models/TrainingRequest.ts b/src/models/TrainingRequest.ts
index 80511ed..183f590 100644
--- a/src/models/TrainingRequest.ts
+++ b/src/models/TrainingRequest.ts
@@ -1,4 +1,4 @@
-import { Association, CreationOptional, ForeignKey, InferAttributes, InferCreationAttributes, Model, NonAttribute } from "sequelize";
+import { Association, CreationOptional, ForeignKey, InferAttributes, InferCreationAttributes, Model, NonAttribute, Op } from "sequelize";
 import { User } from "./User";
 import { TrainingType } from "./TrainingType";
 import { TrainingSession } from "./TrainingSession";
@@ -40,6 +40,7 @@ export class TrainingRequest extends Model<InferAttributes<TrainingRequest>, Inf
     declare course?: NonAttribute<Course>;
     declare training_session?: NonAttribute<TrainingSession>;
     declare training_station?: NonAttribute<TrainingStation>;
+    declare number_in_queue?: NonAttribute<number>;
 
     declare static associations: {
         user: Association<TrainingRequest, User>;
@@ -64,6 +65,16 @@ export class TrainingRequest extends Model<InferAttributes<TrainingRequest>, Inf
             },
         });
     }
+
+    async appendNumberInQueue(): Promise<void> {
+        this.number_in_queue = await TrainingRequest.count({
+            where: {
+                training_type_id: this.training_type_id,
+                status: "requested",
+                id: { [Op.lte]: this.id },
+            },
+        });
+    }
 }
 
 TrainingRequest.init(TRAINING_REQUEST_TABLE_ATTRIBUTES, {