Wrap up in a blanket
Not everyone wants to be cool.
Even when the heating's on full in the Main Library, there's still spots that are cold. And sitting still for long periods to study can make you feel cold as well.
With snow and freezing fog forecast, we now have blankets in the Main Library. You'll find them in baskets by the lifts on floors one, two, and three, and on the ground floor by the photocopiers.
Just help yourself, and when you've finished with the blanket, return it to the basket by the lockers on your way out.