How are you doing Newfella? Keep in touch.
The NHS is barely functioning for anyone much beyond active emergencies so it might be as well to to formulate a plan for stopping without their input other than a clinical emergency.
I was drinking roughly the same amount (of scotch) and it was hard - a real roller-coaster for the first few days, but you just have to hang on to the knowledge that it's not forever. I had not suffered any huge withdrawal symptoms (other than insomnia and desperately craving a drink) so I quit on my own but it makes sense to let someone know if you can.
Thousands of people quit successfully, including on this website, you're in the right place and trying to do the right thing. Good signs. You can do this Newfella.