Paddy, don't despair just yet. You've been sober before and you can do it again. See if you can find accommodation for long enough to arrange for the bank to take back the house.
Various charities have social workers who may be able to help you get your affairs in order and qualify for a council house. I agree that drinking is the source of your troubles, but it's best tackled when you have secure housing to stop you going into a slump.
Call 116 123 which is the suicide helpline. Other resources for you could be the street doctor, AA, the Salvation Army and the social arm of the Catholic Church.
You will be able to resolve your housing troubles, but please ask for help doing this and if you feel like ending it, seek medical help.
I'm thinking of you and as a sober A I can tell you there is hope for building your life again.