Walking around our TV compound here in Davos I spotted some nice fat electricity cables running around the trucks, in and out of the snow. So I over-exposed by 2 stops to get the whites whiter (slightly losing detail it has to be said), leaving punchy colours and a nice clean shot.
@emmy555 Thank you. Over-exposing helps and then just pushing it a little more, and with a contrast tweak in Photoshop. I didn't want snow detail so just over-cranked it by +2 stops.