diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index ea54fb1..3ade36d 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 # // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 # SPDX-License-Identifier: MPL-2.0
 # Analyses the GitHub Actions workflows in this repo. This is a Julia
diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index 3665d45..6270c49 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 # // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 # SPDX-License-Identifier: MPL-2.0
 name: Mirror to Git Forges
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index bec6d98..354bfc4 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 name: GitHub Pages (Ddraig SSG)
 on:
   push:
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index d239cf1..f406c68 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 # // Copyright (c) Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
 # SPDX-License-Identifier: MPL-2.0
 name: Secret Scanner