Open chrome, ensure you are logged into your work email (HAS to end in @sjb.school, not @sjb.surrey.sch.uk - If not or unsure please contact IT) Go to https://remotedesktop.google.com/access and click on the blue download arrow
Once you click the blue download arrow, it will bring this box up, click "Add to Chrome" and press allow
This will choose when its complete, then complete your name and add you PIN
The setup is now complete