looking for advice on alcoholism

[blakie]

I'm 23 years old and have a brother who is 20. we have both left home.
my mum is still with my dad and is having some real problems with his drinking. it started about 3 years ago he was off work for about a year in 2 years sorta 6 months on 6 months off, due to stress, high blood pressure etc. now he has always liked his wiskey but never before 5pm, but being off work in my opinion slowly led to bordom and possibly mild depression (in my opinion, I'm not a shrink) and so the drinking got earlier and earlier. until he went back to work. 6mths later back off work again due to the stress and back on the drink. we all thought it had stopped when he went back to work but found that he was coming home on his lunch hour and having a large one. my dad is a small bloke less that 5'6" and must weigh about 8 stone max, so that one drink goes a long way. 6mths later he was made redundant, 40 years service in the same job.

Obviously we understand that it must be hell going from working a 40 hr week to nothing at all. but the drinking has become worse and he is driving under the influence with his new grand daughter in the car. he's also not eating and loses entire days. please help, we just don't know what to do