Lunchtime walk

StepYearBlip day 6 (Blip when your step count hits your birth year.)
This is heading out for a lunchtime walk at work. Still quite warm but by the evening was definitely cooling down with the forecasters warning of a "touch of frost" in the glens. I do wonder where that phrase comes from. UK TV weather presenters use it all the time instead of "a light frost" or "a bit of frost" and so on. Is it British? Maybe it comes from Jack frost touching things.