Four identical houses in a row. Ours is the house on the left, where least of the ice has been melted by our heating, therefore showing that the insulation I've installed in the roof is working well (or perhaps that we've got our thermostat set lower).
We haven't really done much in the way of loft insulation yet, it's a start and we will add more.
I covered our cavity wall insulation a few months back.
In 2017 we added more insulation to the roof and there's now a more impressive photo showing the roofs.