Dear antipodes, we would use a small box of your heat here. Chilly, chilly, windy windy, freezy freezy. 18°C here in the house, woolen socks on my feet. It is Tygr´s catflap, it is old and the insulation is bad, it allows that cold cold air inside because the wind is blowing against it!!!!
Typically, Tygr himself is sleeping on and armchair:-)
Good, so your computer is safe, great!!!!