[1] She was educated at Parliament Hill School in North London and was a member of her local Air Cadet unit (which she later described as being a "wonderful experience" and a positive influence on her later life).
[1] Trevelyan moved to the BBC in 1993, initially taking roles as a researcher for Breakfast News and as an assistant producer for Newsnight, before becoming a reporter for On the Record in 1994, where she covered the IRA ceasefire and Northern Ireland peace process.
[citation needed] From 2006 to 2009, Trevelyan covered the United Nations, travelling to Darfur, Congo, Burma, and Sri Lanka, and was the first journalist to interview Secretary-General Ban Ki-moon.
[citation needed] In 2022, after uncovering her family's links to slavery in the Caribbean, Trevelyan made a documentary for the BBC World Service called Grenada: Confronting the past in 2022.
[3][4] In March 2023, Trevelyan announced she would be stepping down from her position at the BBC after "thirty incredible years" to become a full-time advocate for reparations for slavery.
[9][4] In the wake of a cancelled visit to Grenada by the Earl and Countess of Wessex in April 2022, Trevelyan described this as "rank unfairness fuelling calls for more than expressions of profound sorrow from the UK government and the royal family that slavery ever happened".