It has been cold here in London during the past few days. Even a bit of snow over the weekend, but I wasn't in town to see it.
There is nothing more unpleasant than having to work in a cold workshop. Your hands get cold, your feet get cold, and it is very hard to concentrate on what you are doing. And when you don't concentrate a mistake is bound to be made.
Lucky for me, the workshop I am in is nice and snug. A couple of years ago, the owners had an industrial gas heater installed. It is rather like a very large hair-dryer that blows out a vast amount of hot air. It gets the whole workshop warm in minutes.
The only downside is that I have no excuse to loose concentration and let my mind wander!