Can you clarify the use of VPN for staff who aren't considered to be business critical?

The VPN system serves the whole of the NHS in Wales and if all users worked from home during normal office hours it would cause capacity issues. Therefore we have to prioritise users who are working on our response to COVID-19. Our advice to those staff members currently at home and not working on COVID-19 is change the way you work to accommodate this enhanced demand. It is suggested that staff log on at set times of the day to download emails and send responses and work offline otherwise.