diff --git a/app/celery/scheduled_tasks.py b/app/celery/scheduled_tasks.py
index 4448079f0..097448ed8 100644
--- a/app/celery/scheduled_tasks.py
+++ b/app/celery/scheduled_tasks.py
@@ -27,17 +27,24 @@ def remove_csv_files():
 @notify_celery.task(name="run-scheduled-jobs")
 @statsd(namespace="tasks")
 def run_scheduled_jobs():
+    from app import db
     try:
         jobs = dao_get_scheduled_jobs()
         for job in jobs:
             job.job_status = JOB_STATUS_PENDING
-            dao_update_job(job)
-            process_job.apply_async([str(job.id)], queue="process-job")
+            from time import sleep
+            sleep(1)
+            print('SCHEDULING' + str(job.id))
+            # dao_update_job(job)
+            # process_job.apply_async([str(job.id)], queue="process-job")
             current_app.logger.info(
                 "Job ID {} added to process job queue".format(job.id)
             )
+        db.session.add_all(jobs)
+        db.session.commit()
     except SQLAlchemyError as e:
         current_app.logger.exception("Failed to run scheduled jobs", e)
+        db.session.rollback()
         raise
 
 
diff --git a/app/dao/jobs_dao.py b/app/dao/jobs_dao.py
index 41ba00940..b9b677708 100644
--- a/app/dao/jobs_dao.py
+++ b/app/dao/jobs_dao.py
@@ -52,6 +52,7 @@ def dao_get_scheduled_jobs():
             Job.scheduled_for < datetime.utcnow()
         ) \
         .order_by(asc(Job.scheduled_for)) \
+        .with_for_update() \
         .all()
 
 
diff --git a/lambda_function/README.md b/lambda_function/README.md
new file mode 100644
index 000000000..3a8df5a1a
--- /dev/null
+++ b/lambda_function/README.md
@@ -0,0 +1,9 @@
+# Lambda function
+
+This code is used to setup a lambda function to call into our API to deliver messages.
+
+Basic expected flow is that an request to GOV.UK Notify to send a text/email will persist in our DB then invoke an async lambda function. 
+
+This function will call /deliver/notification/{id} which will make the API call to our delivery partners, updating the DB with the response.
+
+## EXPERIMENTAL AT THIS STAGE