relay with Hoyte, Callender and Sonia Lannamann. In 1983, now competing as Kathy Cook, she won two medals at the inaugural World Championships in Helsinki. On day one of the championships, she won a silver medal in the sprint relay, alongside Joan Baptiste, Bev Callender and Shirley Thomas. She then won the bronze medal in the 200 metres in 22.37, behind Marita Koch and Merlene Ottey and ahead of Florence Griffith. In 1984, probably Cook's finest season, she won a further two bronze medals at the Los Angeles Olympics. In the 400 metres, she smashed the UK and Commonwealth record with 49.43 secs, behind the American pair of Valerie Brisco-Hooks and Chandra Cheeseborough. This would remain the UK record for almost 30 years, until Christine Ohuruogu ran 49.41 to win at the 2013 World Championships. Cook then narrowly missed winning a medal in the 200 metres final, where she improved her own national record to 22.10. With a strong late surge, she closed rapidly on Florence Griffith and Merlene Ottey-Page, who won silver and bronze in 22.04 and 22.09 respectively. The race was won by 400m champion, Valerie Brisco-Hooks. Cook's 22.10, stood as the UK record for over 30 years, until Dina Asher-Smith ran 22.07 for fifth at the 2015 World Championships. In the sprint relay, drawn in lane one, she collected another bronze medal, along with Simmone Jacobs and two of her Moscow teammates, Bev Callender (Goddard) and Heather Oakes (Hunte). They ran 43.11 At the end of the 1984 season, Cook ranked 10th on the world all-time lists for both the 200m and 400m and would remain in the all-time top ten until 1986 (200) and 1988 (400). Shortly after the Los Angeles Olympics, Cook won in London over 300 metres, edging out Chandra Cheeseborough. Both were given the time of 35.46 secs, which broke the world best for the rarely contested distance. The mark would remain a world outdoor best until 2003, when Ana Guevara ran 35.30, although it is worth noting that Marita Koch ran a sub 35 sec 300 m split, on her way to her 47.60 world 400 m record in 1985. 1984 would prove to be the peak of Cook's career. In 1985, her 200 metres season's best was 22.87 for fifth in the European Cup, while in 1986, she failed to run below 23 seconds. She did still manage to win four