I like how you ignored the rest of my post....
Remember that I deal with pre hospital care, I'd argue that A&E see more of the sober late night emergencies than we do simply because those who are sober are better placed to make their own way to hospital. (Just for SD1, I'll clarify that I can't prove this, but it does seem logical.)
<snip>.
Based solely upon four late night admissions to A&E, two of which were by ambulance and none of which was alcohol related, I have to say in my limited experience, A&E was littered with people either presenting themselves, or arriving by ambulance, following incidents fueled by alcohol. Many of those in A&E had clearly drunk too much, whilst others had clearly been drinking, but were in the wrong place at the wrong time. And of the admissions, only one was on a Friday night.
When my one of my daughters was a nurse in London, she did a stint in A&E. Her feedback, again anecdotal, was that alcohol played a part in most of the patients seen in A&E during the hours 9pm to 3am.