There's No Other Way.
I have come to a decision for the sake of my health and my sanity. At the current time I cannot do my current job without seriously fucking up my head. I had a chat with my boss today, as he wanted to know how I got on at the medical on Friday. I have decided it is best if I move on. So I am going to look for a transfer back to Southend. I'm lucky that I have got the support of my manager in this. He has had severe stress in the past (although not depression) so he is empathetic as a result. It will mean a bit of a drop in salary, but my health is more important than a couple of grand a year. Anyway it won't be so bad as I won't have to fork out for travel up to London three times a week.
This is something I should have done ages ago but I kept convincing myself that I was going to be alright in a couple of days and my concentration levels were going to be miraculously restored. This hasn't happened and I don't think it will for a bit, so this is the best option. It might not stop the anxiety but it will be one thing less to fret about.
On another note, I am going to my first ever Yoga class tomorrow. I have been thinking of trying yoga for ages but didn't really want to go on my own. Anyway my mate Jim wants to try it too so we've found a class nearby that specialises in beginners and intermediates, so we're going to give it a go tomorrow night. I have spoken to several people, including my sister, who have found it very beneficial in relaxing the mind and body. It's worth a try. It would be nice to relax for once.