Hi, I'd like to help you with your question.
Someone who has a history of anger issues and depression can be treated successfully on an outpatient basis. He would need to be motivated to get help and be willing to look at this issues that cause his anger and depression so the therapy can be effective.
The only reason a person with the symptoms of anger and depression would need to be hospitalized if they are a danger to themselves or someone else. The person has to say they want to hurt someone or themselves and have a plan on how they would accomplish this before they would need to be hospitalized. The person can also go into the hospital on a 201, which is a voluntary admission to the hospital. The doctor would still need to approve the admission, but if the patient is having trouble functioning in daily life and/ or needs a medication adjustment in order to function better, then admission can be warranted.
I hope this helps you,
There is no harm in trying to see if your doctor will admit you. If you feel you are unable to cope with your life at this point and need the intensity of inpatient treatment as well as quicker access to outpatient treatment, you can express this to your doctor. They are going to admit you on your current mental health status only and not so much on your past history, so if you feel bad right now it's worth trying to get admitted. The more you can tell them about how your status is negatively impacting your daily life, the better.
I understand the system in the UK is slower and sometimes it takes forever to get an appointment which makes it so stressful when you want help to recover. Hopefully, you have already gotten the ball rolling and are on the list for an appointment. If not, you may want to do that as soon as you can.
You can also try alternative treatments such as on line therapy, self help, and support groups. They may offer some relief until you can get into therapy.