Rediscovering English winter

I haven't been back here for 24 hours and I have noticed (again), the particularity of English winter: it's colder inside. I was expecting the snow that fell last week and which is still here. I was not expecting, however, that I would be freezing at minus 5. Or that I would be freezing inside the Heathrow bus station. The doors were wide open, and it was just as cold inside as it was outside. I should have expected it, but I didn't. And while I had a warm coat, it didn't feel warm enough. Maybe it was a symptom of the jet lag, but I wish I had brought with me my Kanuk coat. Unfortunately, I thought I would only need it Québec. I was foolish, but hopefully I will remember next time.