A scan of my sketchbook. My weather app said it was 2 ºC feeling more like -2ºC and it certainly did. I'd been exercising around the park beforehand so had a bit of excess body heat but it didn't last long. The fingers were the first to go after about 20minutes.
I drew 70% of the line work in the park finishing off and applying coffee wash and white ink back at home in the warm.