Apologies if this is a really basic question, but I'd really appreciate any advice.  We have a door with an old-fashioned keyhole, which is not covered, and so when it's windy outside we can feel a cold draft coming in through the keyhole. Here is a photo of the door handle so you can see the keyhole:   I'd like to try and eliminate the draft to reduce heat loss from the room.  I've tried googling for solutions and found this keyhole escutcheon cover: https://loopsdirec