diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index bda55d38f..d01c57a3b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -33,5 +33,6 @@ repos:
       - id: copyright-headers
         name: copyright-headers
         language: script
+        types_or: [python, shell, yaml, dockerfile]
         entry: bin/linters/check_headers_exist.sh
 
diff --git a/README.md b/README.md
index 2b4573e9d..a9938270c 100644
--- a/README.md
+++ b/README.md
@@ -142,7 +142,7 @@ setfacl -R -m d:g::rwX /gae/pixl_dev
 
 ### 1. Choose deployment environment
 
-This is one of dev|test|staging|prod and referred to as `<environment>` in the docs.
+This is one of `dev|test|staging|prod` and referred to as `<environment>` in the docs.
 
 ### 2. Initialise environment configuration
 
diff --git a/bin/linters/check_headers_exist.sh b/bin/linters/check_headers_exist.sh
index 2542f211f..d7c1e6fa8 100755
--- a/bin/linters/check_headers_exist.sh
+++ b/bin/linters/check_headers_exist.sh
@@ -12,15 +12,15 @@
 #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
+set -euo pipefail
 
-for ext in ".yml" ".yaml" ".sh" "Dockerfile" ".py"
-do
-    # shellcheck disable=SC2044
-    for path in $(find . -name "*$ext")
-    do
-        if ! grep -q "Copyright" "$path"; then
-            echo -e "\n\e[31m»»» ⚠️  No copyright/license header in $path"
-            exit 1
-        fi
-    done || exit 1
+for f in "$@"; do
+    if ! grep -q '#.*Copyright.*University College London Hospitals NHS Foundation Trust' "$f"; then
+        echo "No copyright notice found in $f"
+        exit 1
+    fi
+    if ! grep -q '#.*Licensed under the Apache License, Version 2.0' "$f"; then
+        echo "No licence notice found in $f"
+        exit 1
+    fi
 done