This is from the Penguin blurb for the upcoming book (I quoted it on the previous thread but this is the most relevant bit)
'Despite 45 years of walking together, setbacks in her husband, Moth's, health have led him to see his decline as inevitable, which Raynor refuses to accept. Feeling trapped, she is drawn north, like a migratory bird, seeking the peace and hope that walking brings her.'
It particularly annoyed me as a carer knowing the impossibility of taking off at will. I'm not sure when this walk was done?