diff --git a/web/packages/new/photos/services/collection.ts b/web/packages/new/photos/services/collection.ts
index 28441365b4..02f73e0ce7 100644
--- a/web/packages/new/photos/services/collection.ts
+++ b/web/packages/new/photos/services/collection.ts
@@ -121,10 +121,9 @@ export const createCollection2 = async (
     type: CollectionType,
     magicMetadataData?: CollectionPrivateMagicMetadataData,
 ): Promise<Collection> => {
-    const masterKey = await ensureMasterKeyFromSession();
     const collectionKey = await generateKey();
     const { encryptedData: encryptedKey, nonce: keyDecryptionNonce } =
-        await encryptBox(collectionKey, masterKey);
+        await encryptBox(collectionKey, await ensureMasterKeyFromSession());
     const { encryptedData: encryptedName, nonce: nameDecryptionNonce } =
         await encryptBox(new TextEncoder().encode(name), collectionKey);
     const magicMetadata = magicMetadataData
@@ -134,7 +133,7 @@ export const createCollection2 = async (
           )
         : undefined;
 
-    const collection = await postCollections({
+    const remoteCollection = await postCollections({
         encryptedKey,
         keyDecryptionNonce,
         encryptedName,
@@ -143,12 +142,16 @@ export const createCollection2 = async (
         ...(magicMetadata && { magicMetadata }),
     });
 
-    return decryptRemoteCollection(
-        collection,
-        await decryptCollectionKey(collection),
-    );
+    return decryptRemoteKeyAndCollection(remoteCollection);
 };
 
+/**
+ * Given a {@link RemoteCollection}, first obtain its decryption key, and then
+ * use that to decrypt and return the collection itself.
+ */
+const decryptRemoteKeyAndCollection = async (collection: RemoteCollection) =>
+    decryptRemoteCollection(collection, await decryptCollectionKey(collection));
+
 // TODO(C2): Temporary method to convert to the newer type.
 export const collection1To2 = async (c1: Collection): Promise<Collection2> => {
     const collection = RemoteCollection.parse({
@@ -191,6 +194,11 @@ export const decryptCollectionKey = async (
     }
 };
 
+/**
+ * Zod schema for a remote response containing a single collection.
+ */
+const CollectionResponse = z.object({ collection: RemoteCollection });
+
 /**
  * Create a collection on remote with the provided data, and return the new
  * remote collection object returned by remote on success.
@@ -204,8 +212,31 @@ const postCollections = async (
         body: JSON.stringify(collectionData),
     });
     ensureOk(res);
-    return z.object({ collection: RemoteCollection }).parse(await res.json())
-        .collection;
+    return CollectionResponse.parse(await res.json()).collection;
+};
+
+/**
+ * Fetch a collection from remote by its ID.
+ *
+ * Remote only, does not use or modify local state.
+ *
+ * This is not expected to be needed in the normal flow of things, since we
+ * fetch collections enmass, and efficiently, using the collection diff
+ * requests.
+ *
+ * @param collectionID The ID of the collection to fetch.
+ *
+ * @returns The collection obtained from remote after decrypting its contents.
+ */
+export const getCollectionByID = async (
+    collectionID: number,
+): Promise<Collection> => {
+    const res = await fetch(await apiURL(`/collections/${collectionID}`), {
+        headers: await authenticatedRequestHeaders(),
+    });
+    ensureOk(res);
+    const { collection } = CollectionResponse.parse(await res.json());
+    return decryptRemoteKeyAndCollection(collection);
 };
 
 /**
diff --git a/web/packages/new/photos/services/collections.ts b/web/packages/new/photos/services/collections.ts
index 34fac14765..f2b37e6d69 100644
--- a/web/packages/new/photos/services/collections.ts
+++ b/web/packages/new/photos/services/collections.ts
@@ -31,7 +31,7 @@ import HTTPService from "ente-shared/network/HTTPService";
 import localForage from "ente-shared/storage/localForage";
 import { getData } from "ente-shared/storage/localStorage";
 import { getToken } from "ente-shared/storage/localStorage/helpers";
-import { isHiddenCollection } from "./collection";
+import { getCollectionByID, isHiddenCollection } from "./collection";
 import { ensureUserKeyPair } from "./user";
 
 const COLLECTION_TABLE = "collections";
@@ -292,34 +292,6 @@ export const getCollectionWithSecrets = async (
     };
 };
 
-export const getCollection = async (
-    collectionID: number,
-): Promise<Collection> => {
-    try {
-        const token = getToken();
-        if (!token) {
-            // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-            // @ts-ignore
-            return;
-        }
-        const resp = await HTTPService.get(
-            await apiURL(`/collections/${collectionID}`),
-            // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-            // @ts-ignore
-            null,
-            { "X-Auth-Token": token },
-        );
-        const collectionWithSecrets = await getCollectionWithSecrets(
-            resp.data?.collection,
-            await ensureMasterKeyFromSession(),
-        );
-        return collectionWithSecrets;
-    } catch (e) {
-        log.error("failed to get collection", e);
-        throw e;
-    }
-};
-
 const TRASH_TIME = "trash-time";
 const DELETED_COLLECTION = "deleted-collection";
 
@@ -402,7 +374,7 @@ export async function syncTrash(
                 const collectionID = trashItem.file.collectionID;
                 let collection = collectionByID.get(collectionID);
                 if (!collection) {
-                    collection = await getCollection(collectionID);
+                    collection = await getCollectionByID(collectionID);
                     collectionByID.set(collectionID, collection);
                     await localForage.setItem(DELETED_COLLECTION, [
                         ...collectionByID.values(),