[1][3] Born in Newcastle-under-Lyme, Staffordshire, England, Bloomfield was educated at Abbeydale Grange School, Sheffield and Sussex University, where she obtained a BA (Hons) degree in Geography.
[1] She was a local group secretary, national council and executive, regional worker in the West Midlands for CND.
[5] Bloomfield organised the campaign to stop arms trade shows being held at the National Exhibition Centre in Birmingham in 1991.
[4] After 1997, Bloomfield's main work was as UK co-ordinator of the Atomic Mirror (she was the British director from 1995[5]),[2][4] whose goal is to create a nuclear-free world.
The Atomic Mirror is a founding member of the Weapons of Mass Destruction Awareness Programme, of which Bloomfield was a spokesperson.