I agree with what people have said above. It's amazing that you've recognized that this is a problem. As others have suggested try and tell people you trust (that aren't a part of the problem) like parents or family, really good friends and also try and contact those that treated you while you were hospitalized. Things won't get better on their own unfortunately, especially when they have progressed to the point that you are often drunk by 10am. Someone mentioned that you are in the UK and there are AA meetings all across the globe, here is the link for the UK ones:
http://www.alcoholics-anonymous.org.uk/
It's a great step, especially if you can't get into proper treatment facilities and a great resource if nothing else. Many people are skeptical about AA and ask whether it's "really" anonymous, and yes 100% you only tell them as much about you as you feel comfortable, no one makes note of your first and last names and in most cases the person you choose to be your sponsor is the only person that knows things like your full name/phone number/ etc.
Please take care and work to fix this problem, you don't want it to completely ruin all the progress you've made since being discharge.