What to know

• Her son and co-star Sam Gardiner died after a car accident last year.S1
• Former TV contestant, Jo Gardiner, 61, dies of cancer one year after her son's death in a crash.S2
• The mother and son competed in the TV competition during its second series in 2020S3
• 'She was one of a kind.'S4
• Jo Gardiner competed with her son Sam in the hit BBC show during its second series in 2020S5
• Race Across The World star Jo Gardiner has died, a year after her co-star son Sam was killed in a car crash.S6
• Jo Gardiner's son and co-star Sam died in a car crash on the A34 in 2025S7