Hilary Fortnam (née Awdry) is Wilbert and Margaret Awdry's daughter, Christopher and Veronica's sister, and George Awdry's niece. She appeared in the Thomas the Tank Engine Man Documentry in 1995. She later appeared alongside Christopher on BBC News and local BBC radio stations to celebrate 65 years of Thomas.
In Autumn 2011, Hilary sent a letter to The Daily Telegraph criticizing HiT Entertainment's decision to rebrand Christmas in the television series as "the winter holidays" as of Season 8. Her letter stated: "I am dismayed at 'Thomas the Tank Engine' having to call a Christmas tree a 'winter holiday tree'. It is not what my father wrote. Those who now write his stories should not take Christ out of Christmas."