Berlin is a good 5°C colder than London in the winter. In London I had one jacket, mostly to protect against rain, but it was also an extra layer. In Copenhag

Berlin is a good 5°C colder than London in the winter. In London I had one jacket, mostly to protect against rain, but it was also an extra layer. In Copenhagen, which has similar winter temperatures to Berlin, I had to buy a thicker jacket for the winter. I've worn the new jacket on trips to London and felt hot.