I remember I was at my uni library and I learned from a tweet of the health ministry that schools and unis are shutdown for the foreseeable future. I immediately went home early.
I remember telling my siblings “Meh this will probably last a week or so”. lol in hindsight.
UK, so announced in the evening before it happened. My patio was in the process of being done and they struggled to get the slabs as all the builders merchants were closed, fortunately it did get finished - their last job for a while. Other than that I was working from home but I don’t remember if that came in slightly before lockdown was officially announced. Went from five days in the office to none.