Hi Natalie,
I’m sorry to read your post and see how your brother’s drinking and drug taking affects both you and your mum. It’s very difficult for you as he does need to accept he needs help to be able to change.
If you and your mum would like any support for yourselves please contact us at The Icarus Trust. We are a charity that provides support to the families of people with addictions, because we know how hard it is to cope with this. If you contact us we can put you in touch with one of our trained and experienced people who would listen and try to help you find a way through.
You can contact us on help@icarustrust.org or visit the website http://www.icarustrust.org
Good luck with everything.