I suspect the barrister who mitigates will ask the judge to be wary of 'double counting' and to pass concurrent sentences.
The attempt GBH is the most serious - maximum five years - against the maximum of two years for dangerous driving.
There don't appear to be any sentencing guidelines for the attempted form of the offence, but there are for GBH.
Those suggest level two - lesser harm, but high culpability.
Starting point 18 months, range one to three years.
http://www.sentencingcouncil.org.uk...ssault_definitive_guideline_-_Crown_Court.pdf
Wrong offence.
There are two here:
"Causing grievous bodily harm with intent to do grievous bodily harm" (s18)
or
"Inflicting grievous bodily harm" (s20)
It is not possible to attempt to inflict grievous bodily harm without intent.
So the offence is s18, not s20.
In this case there appears to be higher culpability, as she used a weapon or weapon equivalent, but not harm.
The range of sentencing for the offence is 3-16 years, and for this Category 2, it is 5-9 years with a starting point of 6 years.
So she SHOULD be facing AT LEAST five years, and as the minimum sentence for the offence is 3 years, there is no possibility of a suspended sentence (unless the judge decides there are grounds to overrule the entire sentencing guideline).