I'm guilty of not getting all the details so I'm reserving my judgement, but I saw on the BBC that the woman was deemed too drunk to give consent, she was 2.5x over the drink drive limit. I though the limit was 2 units? In which case she had 5 units in her system? I.e. 2.5pints?? Surely that can't be right?
The drink drive limit in England is 80 milligrames of alcohol per 100 ml of blood.
Its also expressed as 40 microgrames of alcohol in 100 millilitres of breath (Drink drive limit is 35 but they only prosecute at 40 and above).
There is no direct equivalent relationship between units of alcohol stated on a bottle of beer or wine and what appears in your breath or bloodstream. The reason being it depends on an individuals ability to absorb alcohols and for the body to break it down via the liver etc. Factors such as stomach contents, an individuals actual total blood capacity and digestive metabolism all make this guesswork.BMI is also a factor. There are guidelines about the relationship between units of alcohol consumed and the likely levels in your bloodstream but its only a guide .
In my experience as a former Custodt Sergeant if someone is 2.5 times the drink drive limit that's an Evidential Intoxilyser Machine reading of 100 mg of alcohol per 100ml of breath that's well and truy drunk in common parlance.
The Intoxilyser Machine used in Police Stations is out of range at a reading of 200 that's getting close to fatal alcohol poisoning levels for some people.
When I had my Police Training for the old LIon Intoximeter we had a course where in the evening different students drank various amounts of acohol in the Police Bar and we tested ourselves on the machine afterwards.
We were actually quite surprised that one student failed the test after drinking just 2 Pints of Beer yet another passed the test after 3 double Whiskys.
Most people would stuggle to be coherent at 2.5 times the limit unless you were a heavy everyday drinker. Certainly walking in a straight line woud be difficult !
I personally would be close to unconscious / sleep at that level but I never drink more than 2 pints in an evening out so my tolerance level is quite low.