Seconding this to the top two. Being based in NE Hampshire I remember the 21st December 2009 event well. It started off with some sleet in the morning, think I got my hair cut around then. Then it rained (some of the rain was heavy) and washed away the 5 inches of snow already on the ground (for the most part) from a few days previously (the night of 17/18 December, this was forecast). Then it turned to flakes of heavy wet snow which lasted until well into the evening. I think 5/6 inches of snow in total fell from this event.
1st February 2019 I think anywhere between the M3/A303 and M4 got lucky (or unlucky if you prefer) with this particular snow event, given how uneventful the winter of 2018/2019 was otherwise. It was interesting since a low had kinda developed at close range models the night/morning before, and I didn't take it too seriously until I was at work and snow started to fall and become heavier and heavier. It was interesting since not far to the north/south/east of this area, there wasn't much snow to be had. It was a very localised and significant snow event for a very specific area of central southern England. Northern Hampshire was in the firing line for this intense snowfall. I had to close work early as the snow was so deep, and more crucially, unforecast. I measured 16cm in my hometown later that evening, wasn't what I was expecting. Surprises can and do happen sometimes in our part of the world.