diff --git a/classes/task/update_displayed_images_adhoc.php b/classes/task/update_displayed_images_adhoc.php
new file mode 100644
index 00000000..ae0463b0
--- /dev/null
+++ b/classes/task/update_displayed_images_adhoc.php
@@ -0,0 +1,60 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Grid update displayed image adhoc task.
+ *
+ * @package    format_grid
+ * @copyright  2024 G J Barnard.
+ * @author     G J Barnard -
+ *               {@link https://moodle.org/user/profile.php?id=442195}
+ *               {@link https://gjbarnard.co.uk}
+ * @author     Based on code originally written by Paul Krix and Julian Ridden.
+ * @license    https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
+ */
+namespace format_grid\task;
+
+/**
+ * Grid update displayed image adhoc task class.
+ *
+ * @package    format_grid
+ * @copyright  2024 G J Barnard.
+ * @author     G J Barnard -
+ *               {@link https://moodle.org/user/profile.php?id=442195}
+ *               {@link https://gjbarnard.co.uk}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
+ */
+class update_displayed_images_adhoc extends \core\task\adhoc_task {
+    /**
+     *  Run the task.
+     */
+    public function execute() {
+        $trace = new \text_progress_trace();
+        $courseid = $this->get_custom_data();
+        self::do_update_displayed_images_task($trace, $courseid);
+    }
+
+    /**
+     * Do the task.
+     *
+     * @param progress_trace $trace The trace object.
+     * @param $courseid Course id.
+     */
+    protected static function do_update_displayed_images_task(\progress_trace $trace, $courseid) {
+        $trace->output('Executing Grid update displayed images adhoc task on course id ' . $courseid . '.');
+        \format_grid\toolbox::update_displayed_images($courseid);
+    }
+}
diff --git a/classes/task/update_displayed_images_task.php b/classes/task/update_displayed_images_task.php
new file mode 100644
index 00000000..4c0dbf68
--- /dev/null
+++ b/classes/task/update_displayed_images_task.php
@@ -0,0 +1,55 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Update displayed images task.
+ *
+ * @package    format_grid
+ * @copyright  2024 G J Barnard.
+ * @author     G J Barnard -
+ *               {@link https://moodle.org/user/profile.php?id=442195}
+ *               {@link https://gjbarnard.co.uk}
+ * @author     Based on code originally written by Paul Krix and Julian Ridden.
+ * @license    https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
+ */
+namespace format_grid\task;
+
+/**
+ * Grid update displayed images task.
+ *
+ * @package    format_grid
+ * @copyright  2024 G J Barnard.
+ * @author     G J Barnard -
+ *               {@link https://moodle.org/user/profile.php?id=442195}
+ *               {@link https://gjbarnard.co.uk}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
+ */
+class update_displayed_images_task {
+    /**
+     * Queue the tasks for each grid format course.
+     */
+    public static function update_displayed_images() {
+        global $DB;
+
+        $gridcourses = $DB->get_records('course', ['format' => 'grid'], '', 'id');
+
+        foreach ($gridcourses as $gridcourse) {
+            $task = new update_displayed_images_adhoc();
+            $task->set_custom_data($gridcourse->id);
+            \core\task\manager::queue_adhoc_task($task);
+        }
+    }
+}
diff --git a/db/upgrade.php b/db/upgrade.php
index 7a0f1bf3..0d7f5097 100644
--- a/db/upgrade.php
+++ b/db/upgrade.php
@@ -211,6 +211,19 @@ function xmldb_format_grid_upgrade($oldversion = 0) {
         upgrade_plugin_savepoint(true, 2023051001, 'format', 'grid');
     }
 
+    if ($oldversion < 2023101503) {
+        // Has the upgrade already happened?  Thus in versions for Moodle 4.1+ ?
+        $codebase = get_config('format_grid', 'codebase');
+        if ((empty($codebase)) || ((!empty($codebase)) && ($codebase < 2024090700))) {
+            // No!
+            \format_grid\task\update_displayed_images_task::update_displayed_images();
+            set_config('codebase', 2024090700, 'format_grid');
+        }
+
+        // Grid savepoint reached.
+        upgrade_plugin_savepoint(true, 2023101503, 'format', 'grid');
+    }
+
     // Automatic 'Purge all caches'....
     purge_all_caches();