One of the useful things about a snowfall is that you can look at your roof and see if the snow is melting. If it is, you have poor roof insulation.
But instead of waiting for snow, you can now ask the District Council to bring their thermal camera to your home and take a picture. That gives you an indication of how well each part of your home is insulated.
You can ask here for them to come. If you look at the comments at the bottom of the page, they already have one satisfied customer!