School Admins and Subject Leaders are able to easily remove Customised Assessments by heading to Assessments from the drop down menu under Tracking on the top bar. Once you find the test you're looking to remove, click the three dots to the right hand side, and select either Edit or Delete.

If you wanted to keep the data on the system, just in case you may need it in future, it could be a good idea to hide the test from your classes. To do this, click Quick Edit from the top right corner, and then simply untick the classes that you want to hide the assessment from before clicking Save Changes.

Alternatively, selecting the Delete option will remove the assessment from the platform entirely - it is not possible to get the data back if an assessment is deleted.