Last night around 8PM I noticed that fine ice crystals were being
formed and falling as fine snow. The crystals were quite hard and
could be felt on the face whilst walking

When I woke this morning I assumed the whiteness on the ground was
frost, but on inspection it was clear these were loose particles,
resulting in a covering of 2mm or so. This was in Tadley which is at
around 100 meters ASL. However this was very localised, within a mile
in all directions there was no lying snow.

This isn't the first time I have seen localised snow fall in Tadley.