We can try leaving the back door open more often (wish we had done this during the Summer now!) and see whether that encourages her. Thanks for the suggestion!
As for the walking, we’ve actually tried something similar very recently. My wife is commuting again so we have started both walking to the station and then half way we stop whilst she walks off. Amber (greyhound) is not happy about this and then continues to cry/statue. We can move again either by following the direction my wife went or by heading back for home. Any other direction and she won’t budge!