[2] In retirement, Mitchell pursued writing and photography, capturing local wildlife in her village of Walkington.
[2] She contributed to various organizations, including Innovations in Dementia and York Minds and Voices, and advised on the BBC TV series Casualty and the film Still Alice (2014).
[2] Mitchell raised funds for Dementia UK through annual challenges, which included skydiving, firewalking, and wing walking.
[2] She chose to end her life through the voluntarily stopping eating and drinking (VSED), a topic she discussed in her book One Last Thing.
[2] In her final blog post, she expressed her belief that she had taken control of her own life and urged others to campaign for assisted dying laws.