In other words, 4 months detention unless he blots his copybook during it. It doesn't matter what the theoretical pre-discount parole-ignoring length is. What gets reported and what people see is how long he must be detained, which is four months.
Making or taking a call hands-free is effing around on your phone IMO.
Sorry but I don't want to rebut every single excusing of the killer motorist and the judge who seems like a motorist or at least motorists' friend. I'm still interested what the sentencing guidelines say if he'd squashed a small car. This crash on that road saw the driver sentenced to six years but that was dangerous when driving blind and talking on the phone is only careless
https://www.itv.com/news/anglia/story/2016-09-12/texting-lorry-driver-jailed-for-crash
The lorry driver in your link was convicted of death by dangerous driving, which is the more serious offence and carries a recently increased maximum, of I think, 16 years.
Like it or not, using a hands free device is legal, texting via the handset is not.
The driver in the OP was legally using his phone, which a reasonable person might accept differentiates him from a texting driver.
He was convicted of the lesser offence of death by careless driving which, if dealt with at a crown court, carries a maximum of five years.
For the purpose of sentence, it matters not who he killed, only that he did so.
The texting driver was always going to get a whack.
The death by careless offence can be dealt with in a magistrates' court if the bench accepts jurisdiction and the defendant does not elect a jury trial.
In that instance the maximum sentence is six months, and I've seen a few who have not been given immediate custody.
One I recall was an elderly woman who reversed into an elderly gent in a small car park.
A younger, fitter person might have survived, but he didn't.
The driver admitted causing death by careless driving.
Much as I like stiff sentences, it's hard to see what could be gained by locking her up.
She did all the right things afterwards, including voluntarily packing in driving.