There's multiple issues to this.
Any outside time or leave requires assessment and supervision in many cases, and right now, there are not enough staff to adequately supervise people due to many staff being off ill or self isolating because a family member has symptoms, or, are working from home where they can. If they give this to one person, they have to ensure it is available as an option for everyone on the ward. A blanket ban is far easier than the arguments and fights that would occur if staff levels allowed some patients to have time to go outside and smoke, but resources didn't allow all patients to go outside.
A large percentage of patients with mental health conditions have physical illnesses too, and the majority of those illnesses are auto immune disorders. With a severe respiratory infection spreading mental health professionals are sensible to be encouraging all patients to look after their lungs at this time.
Resources are extremely low in the community - the police are overstretched, ambulances are overstretched. Have you considered what would happen if any patient legged it?
Was your COVID confirmed? Because I have had it for six weeks and smoking has been the last thing on my fucking mind. There was no way I could have smoked even if I had wanted one.
Just before all leave was cancelled I got scared and went home
We are all fucking scared, yet still going to work in many cases - how the fuck do you think people are meant to have resources to get patients on leave and for smoke breaks if their colleagues aren't actually coming into work for (as I am assuming no reason other than being scared) at this point?
About 3/4. ward had Covid but many without symptoms
Were they tested? I am quite surprised that many people in one ward were a) even tested, and b) then went onto test positive, given that there's certain criteria for being tested in the first place, and, the tests are at best between 30% and 50% reliable.
I've lost three of my closest friends in the last three weeks. It has been truly, truly shit (two not related to Covid, one due to Covid).
I am insanely fucking grateful that mental health services are still operating, supporting, reaching out, checking in - yes it sucks it is not face to face, but for me, they are very much still operating. I am sorry if others aren't getting any support but smoke breaks and leave are not high priority at the moment.