Question: Which retired British sprint and hurdling track and field athlete appeared on Bigheads?

Context articles: Kriss Akabusi
Sten Pettersson
Callum Priestley
Damien Greaves
John Graham (hurdler)
Bigheads
Milan Ristić (athlete)
Giovanny Fanny
Anyika Onuora
Jason Gardener

Kriss Akabusi MBE (born Kezie Uchechukwu Duru Akabusi, 28 November 1958) is a retired British sprint and hurdling track and field athlete.
Sten Karl Leopold "Sten-Pelle" Pettersson (11 September 1902 – 1 June 1984) was a Swedish track and field athlete who competed in sprint and hurdling events.
 He competed at the 1924, 1928 and 1932 Summer Olympics in the 110 and 400 m hurdles and 400 m and 4 × 400 m sprint relay (six events in total).
 He won a bronze medal in the 110 m hurdles in 1924, and finished fourth in the 400 m hurdles and 4 × 400 m relay in 1928, while failing to reach the finals on other occasions.
Callum Priestley (born 13 February 1989) is a British former track and field athlete who specialised in sprint hurdling.
 He was banned after a positive sample for banned substances, namely clenbuterol, was found in a urine sample whilst training with the UK team in South Africa in January 2010.
 Despite evidence of tainted food, the ban was upheld.
 Subsequent to the ban, Priestley retired from competitive athletics.
Damien David Greaves (born 19 September 1977 in Forest Gate, Greater London) is a sprints and hurdling track and field athlete who represented Great Britain at the 2000 Summer Olympics in Sydney, Australia.
John Graham (born November 20, 1965 in Moose Jaw, Saskatchewan) is a retired track and field athlete from Canada, who competed in the 400 metres and in the hurdling events.
 John Was University of Calgary's Athlete of the Year in 1985 winning the 300m and 600m, 4 × 200 m and 4 × 400 m races at Canada West and the National Collegiate Championships.
 In 1989, he won those same events again claiming the Canadian athlete of the meet for the second time.
 He represented his Canada on the national team from 1985-1991 and the 1988 Summer Olympics in Seoul, South Korea.
 John won three bronze medals in the Commonwealth games in 1986 and 1990.
 Along the way, John captured 11 National Championships and set numerous national records both indoor and outdoors.
Bigheads is a British television game show produced by Primal Media that has aired on ITV since 23 April 2017 and is hosted by Jason Manford with Jenny Powell and Kriss Akabusi as commentators.
 Contestants are dressed as celebrities with oversized heads, and compete in challenges and are eliminated until a winner is decided.
Milan Ristić (, born 8 August 1991) is a Serbian track and field athlete who specializes in hurdling.
 Having competed in hurdling and other events with archrivals AK Crvena Zvezda and AK Partizan, he has represented Serbia in international competition.
 Ristić has competed in track at both high school and collegiate levels in the United States.
 He is a Serbian national record holder in the indoor 60 meter hurdles and the outdoor 110 meter hurdles events.
 Ristić is a member of Serbian national senior team since 2010.
Giovanny Fanny (born 25 May 1965) is a Seychellois former hurdling track and field athlete.
Anyika Onuora (born 28 October 1984) is a British sprint track and field athlete who competes in the 100 metres, 200 metres and 400 metres, and also the 4×100 metres relay and 4x400 metres relay.
Jason Carl Gardener, MBE (born 18 September 1975) is a retired British sprint athlete.
 He won an Olympic gold medal in the 4x 100 metres relay at the 2004 Olympic Games, and is also the 2004 World Indoor Champion at 60 metres.