In Seoul in 1988, Tanni represented Great Britain and won her first Paralympic medal, the 400m bronze. Spinal surgery forced Tanni to take a year away from the track and incredibly, at the 1992 Barcelona Paralympics, she stormed to victory taking four gold medals in the 100, 200, 400 and 800 metres and a silver in the 4x100m relay. The same year, she won her first of six London Wheelchair Marathons.
"Since her retirement, Tanni has continued to be involved in sport. She is a director of UK Athletics and a member of the board of the London Marathon. In 2008 Tanni was appointed as a member of Transport for London, where she chairs the Environment, Corporate and Planning Panel, and is a member of the Surface Transport and Safety, Health and Environment Assurance Panels. In 2010 Tanni was appointed to the House of Lords, where she serves as a non party political crossbench peer. Tanni took the title Baroness Grey-Thompson of Eaglescliffe in the County of Durham. Tanni is a working peer and hopes to use her experience and knowledge to great effect in debates in the House. She has most recently contributed in the Welfare Reform and Legal Aid Bill" 
In 2005 Tanni became Pro Chancellor of Staffordshire University.
Autobiography - 'Seize The Day'.
- President of NCVO
- Director, London Legacy Development Corporation
- Council, Winston Churchill Memorial Trust
- Patron, Patchwork Foundation
- Director, BBC