|Representing Great Britain|
|2004 Athens||Team championship|
|2004 Athens||Championship test grade III|
|2004 Athens||Freestyle test grade III|
|2012 London||Team championship|
|2012 London||Championship test grade III|
|2012 London||Freestyle test grade III|
Criddle was born on 10 May 1966 in Taunton, Somerset, England. She lost the use of her right arm and right leg following a motorcycle accident in 1985, eventually having the arm amputated in 2003. As a result, she competes in the grade III Paralympic classification.
Criddle first competed at the Paralympics at the 2000 Games held in Sydney, Australia, where she finished eighth in the individual grade III event and fourth in the freestyle grade III. She won individual, freestyle and team gold medals at both the 2001 European Championships and the 2003 World Championships. At the 2004 Summer Paralympics in Athens, Greece, she won three gold medals. Riding the Nina Venables owned horse Figaro IX she won the individual and freestyle grade III events and was a part of Great Britain's victorious squad in the team championship. This made her and Figaro the first horse and rider combination to have won triple gold at consecutive European, World and Paralympic Games. At the 2008 Summer Paralympics in Beijing, China, she was selected to compete as an individual rider and she finished fifth in the individual and fourth in the freestyle.
She was selected as part of the dressage squad for Great Britain at the 2012 Summer Paralympics in London, United Kingdom. Riding LJT Akilles she won a silver medal in the grade III individual event with a score of 71.267%, finishing behind Germany's gold medallist Hannalore Brenner who scored 73.467%, despite having to ask the judges for directions. Criddle's result helped to secure a gold medal for the British squad, which also included Sophie Christiansen, Lee Pearson and Sophie Wells, in the team championship. She won her third medal of the 2012 Paralympics, a silver, in the freestyle grade III, on 4 September.
- "Deborah Criddle". British Paralympic Association. Retrieved 3 September 2012.
- "Deborah Criddle - Official rider Biography" (PDF). British Dressage. Retrieved 3 September 2012.
- Armytage, Marcus (2 September 2012). "Paralympics 2012: Deborah Criddle claims silver in Grade III dressage event". The Telegraph. Retrieved 3 September 2012.
- Baldock, Andrew (3 September 2012). "Equestrianism: Wells pipped at the last but GB extend unbeaten run". The Independent. Retrieved 3 September 2012.
- Gibson, Owen (3 September 2012). "Paralympics 2012: David Weir adds to GB gold rush with 5,000m win". The Guardian. Retrieved 3 September 2012.
- "Ind. Freestyle Test - Grade III". The London Organising Committee of the Olympic Games and Paralympic Games Limited. Retrieved 3 September 2012.
- Armytage, Marcus (4 September 2012). "Paralympics 2012: Great Britain's Deborah Criddle claims third medal with individual freestyle silver". The Telegraph. Retrieved 4 September 2012.
- The London Gazette: . 29 December 2012.
-  Cabinet Office