They do go overboard in the Press, yes...
BUT...
Even 10mm of snow is enough rapidly to become treacherous sheets of ice on roads and pavements as people try to drive or walk on it.
Those wheel-marks in the photo are probably mainly long patches of "black ice". One is visible in the middle foreground.
(The ice itself isn't black of course. It is thin and clear enough to show the black asphalt below it, camouflaging the ice,)
Also, the moan-moan-moan comparisons we keep hearing, with the sub-Arctic / Arctic countries are really silly and meaningless, unless perhaps we live in Scotland or NE of England where settled, thick snow and lasting temperatures below about -3ºC are more likely. I am not sure what conditions in North Wales can be like, on the lower ground.
