She was involved with the short-lived publication, Revision, with Luis Mercier Vega and was a member of the group that edited Revolt, War Commentary, and the newspaper Freedom.

Her mother and sister (medical doctor Giliane Berneri) also attended as members of the Italian and French delegations.

She received much praise for her Freedom Press pamphlet, the anti-Stalinist Workers in Stalin's Russia (1944).

She was cremated at Kensal Green Cemetery and her ashes scattered in a north London park.

In 1952 the memorial committee published Neither East Nor West, a selection of Berneri's articles from War Commentary.