Rooftop swimmers in the snow

There was blizzard today while I was at work. It didn't last too long but as I work in central London on the 10th floor you really appreciate dramatic weather and the views across the city. As you look down from our office you can see a rooftop heated swimming pool and there were people still doing their length while a full-on snow storm was taking place. Shame the camera doesn't really capture how much snow there was in this pic.