Bethany was not there...

There are only 2 reasons for Death in the UK - Respiratory/Cardiac Failure or Brian Output Failure (Brain Death)

Respiratory/Cardiac Failure is one most commonly portrayed in Films and TV and has an instant finality to it.

Brain Death is not as simple...

The 6 test need to be conducted twice by two separate doctors - one not associated with the case already.

Both doctors have to agree on the results for a diagnosis of brain death to be confirmed. 
The tests are carried out twice to minimise any chance of error.

The tests used to determine brain stem death are:
- a torch is shone into both eyes to see if they react to the light 

- the eye, which is usually very sensitive, is stroked with a tissue or piece of cotton wool to see if it reacts

- pressure is applied to the forehead and the nose is pinched to see if there's any movement in response 

- ice-cold water is inserted into each ear, which would usually cause the eyes to move 

- a thin plastic tube is placed down the windpipe to see if it provokes gagging or coughing
- the person is disconnected from the ventilator for a short period of time to see if they make any attempt to breathe on their own

Brain death is diagnosed if a person fails to respond to all of these tests and time of death is given to the time the first set of tests were concluded. 

Bethany Ella Horchover died at 15:03 on the 25th November 2021

Before testing for brain death can begin, doctors must carry out a series of checks to ensure that the symptoms are not being caused by other factors, such as:
- an overdose of illegal drugs, tranquillisers, poisons or other chemical agents 
- an abnormally low body temperature (hypothermia)
- severe underactivity of the thyroid gland 

The Body has to have a chemical/hormone balance (clear tolerances set) - Beths Sodium levels were not playing ball with this one which is why it took all of Wednesday and most of Thursday before the tests could take place.

Once these have been ruled out, tests are carried out to confirm brain death.