Having lived in the UK myself all my life as I was born here, I am used to the colder weather but just recently, especially this past winter as well, it was colder than I ever remember so something I had to get used to as well.
All I can advise is that you wear plenty of layers, cover your mouth and nose to prevent the cold air from getting to them as that can cause a lot of issues and if you don't need to head out, stay in and stay warm.