At nine years old, Lethbridge boarded at Sacred Heart Convent School in Chew Magna, Somerset.
This was achieved through a contact of her father, at that time Chief of Intelligence for the British Army of the Rhine, who had a connection with David Maxwell Fyfe, 1st Earl of Kilmuir, one of the prosecutors at the Nuremberg trials.
With his earnings as an author, as well as a few well-received tele-plays by Lethbridge, the couple bought a villa on the isle of Mykonos, spending time with socialites including Aristotle and Jackie Onassis.
In 1981, Lethbridge was invited to join the chambers of Louis de Pinna on Chancery Lane.
[3] When the government started its assault on public funding in 1995,[clarification needed] she set up Our Lady of Good Counsel Law Centre in Stoke Newington.
[2] Lethbridge’s story was featured in the First 100 Years project, set up to celebrate the centenary of women being able to join the legal profession in the UK and Ireland as a result of Parliament passing the Sex Disqualification (Removal) Act in 1919.
In 2 Hare Court, a pair of white silk gloves was carried to the swearing-in ceremony of 2019 to mark the centenary of women being allowed to enter the legal profession.
[4] Lethbridge published her autobiography in May 2021 - Nemone: A young woman barrister’s battle against prejudice, class and misogyny.
In December 2021, Lethbridge released her second book, Postcards from Greece, a collection of her poems which are intended to be read alongside the first part of her autobiography “Nemone”.