Cyclist’s bike ‘snapped in half’ in fatal collision, inquest hears

I think it's just the formalities of it, the coroner hasn't made their official finding but has to state a reason for the inquest and its adjournment. It is, although rather unlikely, possible that she had a heart attack immediately before being hit for example. 
Due process is important even when it seems ludicrous, and the coroner's job is to determine the cause of death not who is responsible. 

Brauchsel wrote:

I think it's just the formalities of it, the coroner hasn't made their official finding but has to state a reason for the inquest and its adjournment. It is, although rather unlikely, possible that she had a heart attack immediately before being hit for example. 
Due process is important even when it seems ludicrous, and the coroner's job is to determine the cause of death not who is responsible. 

This hits the nail on the head. 

Section 1 of the Coroners and Justice Act 2009 requires a senior coroner to conduct an investigation "if the coroner has reason to suspect that —
(a) the deceased died a violent or unnatural death,
(b) the cause of death is unknown, or
(c) the deceased died while in custody or otherwise in state detention."

So in using the word "unnnatural" here, the coroner is simply setting out the legal grounds upon which she is conducting the investigation.

As Brauchsel said, it is possible that the cyclist had some fatal medical episode immediately prior to the collision — and however unlikely that may be, I seem to recall that we have seen a couple of cases like that over the years, and one of the jobs of the investigation would be to rule that out, ie "natural causes".

A coroner's inquest aims to determine the cause of death rather than apportion blame, and in cases in which a cyclist has been killed as a result of a crash involving a motor vehicle, the conclusion will almost always be "road traffic collision".

Coroners do, however, have other powers, with the one we see most often in cases we report on here on road.cc being to issue a Prevention of Future Deaths report, typically to the relevant highways authority.

Last month, for example, we reported on a case where a coroner ordered East Sussex County Council to review its procedures for inspecting and repairing potholes.

https://road.cc/content/news/council-ordered-mend-road-defects-after-cyc...

Previously, we've also seen a coroner order Transport for London to review the blue paint used on some of the city's older cycleways after a motorcyclist was killed after skidding on the road surface.

https://road.cc/content/news/219036-coroner-urges-transport-london-revie...

To go back to the article here, legal language is of necessity precise, with meanings defined by statute, case law etc and while it may strike some as ... well, unnatural ... to refer to an "unnatural death" here, the coroner is simply setting out her terms of reference, as defined by law.

"

"...killed in a crash involving the driver of a black Honda Civic ... I am led to suspect that the death could have been unnatural"

So the police are suggesting it wasn't a member of one of the herds of Honda Civic drivers that live in the woods near Bridgend?
It might've been a domesticated or even genetically modified one.