Snow!

Hm, yeah VB you are probably right. Thinking about it, it is unlikely that a car would build up enough speed on an icy road to badly injure a passenger, it would most likely crash into a pavement/wall/car before it gets up to any serious speed - at least in most urban areas. That fiesta was on a narrow, residential road, it wouldn't have been going very fast when it would have stopped moving. On a country lane/big A-roads, it might be different

Then again... summer tyres in winter is stupid... drivers should take responsibility for the safety of others as a result of their actions and realise this means that they shouldn't drive when it's icy unless it's critical and that they should consider winter tyres when this stuff seems to be happening more frequently (it's less than a year since cars were sliding about gleefully.

Totally agree, normal tyres just do not work well at all in icy conditions, best thing to do it not drive, or only drive on gritted roads!