For 5 years now i have drunk 4 pints of beer a night. I really don't want to do this and would prefer to stop drinking all together.
OK OP, going back to what you want, which is actually to stop drinking beer every night, and ultimately stop drinking altogether.
What are your reasons for wanting to stop?
Given all your updates I think it would be hard to stop by yourself and without some support and advice, both emotional support and health / alcohol support.
Start with your GP?
There may be alcohol support services in your area?
In the end, you will be able to achieve your stated wish , to lay off the beer, because a heathy body will not put on weight replacing nearly 900 calories of beer with chicken and veg (unless you are eating KFC and sweetcorn fritters as your chicken and veg!) .
It is very easy to get discouraged when you embark on something like this… just look at all the weight loss threads… and you have do many complex issues to deal with.
But with help, you can do it. You have already made sure your kids had a better life than you did, so you can start giving yourself more of the life you want.
Go back to NY resolution, think about what prompted you to make that resolution, find the help that will give you the medical / nutritional/ support you need and the moral support.
Maybe start a thread asking for advice on the agencies who can help or what to ask your GP for?
(also… packs of chicken thighs are really cheap…compared to beer, and look out for the veg in special offer in Lidl)
Good luck!