She has worked as a tutor at the Arvon Foundation,[1] and for several years taught the Guardian masterclass on Historical Fiction.
The Rose of Sebastopol announced on 27 December 2007[3] as one of the ten titles for the Richard & Judy Book Club 2008.
McMahon’s book was subsequently reviewed on the Channel 4 Richard & Judy Show on 24 January 2008.
[4][5] In two subsequent novels, The Crimson Rooms, and The Woman in the Picture, McMahon introduced the character Evelyn Gifford, a pioneering female lawyer who struggles to gain a foothold in the legal world during the 1920s The Hour of Separation, was released in paperback in 2019.
She was appointed as course director by the Judicial College to design and run the national training course for Bench Chairmen.