The ninth edition of the Para World Swimming Allianz Championships returns this September at the London Aquatics Centre.

The event takes place over the course of a week, attracting athletes from around the world as they compete for an Olympic qualification spot for Tokyo 2020.

Around 600 swimmers from 60 countries are set to compete in the championships.

Ones to watch:

Ellie Simmonds (GBR)

Event: 400m Freestyle

Disability Category: S6

Watch her in: Session 2

During the 2008 Beijing Paralympics she secured her first gold medal in the 100m and 400m freestyle, aged 13. Since then she has achieved several World Championship titles and set a world record during Rio 2016 in the 200m medley.

Follow her Twitter @EllieSimmonds1

Ellie Robinson (GBR)

Event: 50m Butterfly

Disability Category: S6

Watch her in: Session 12

The young British athlete holds the world record in the 100m with the time 1:13.46 and paralympic record in the 50m butterfly, both set at the age of 13. She is known for her ‘gangsta swagger’ because she tends to walk out to the pool with her oversized coat and hood up.

Follow her Twitter @EllieRobinsonGB

Ellen Keane (IRL)

Event: 100m Breaststroke

Disability Category: SB8

Watch her in: Session 14

Keane is the current 100m breaststroke European Champion. She was the youngest para athlete competing when she won a bronze medal at her first Olympic Games in Rio. The 24-year-old has recently qualified for Tokyo 2020 at the European Championships in Bath. This will be her third Olympic Games.

Follow her Twitter @keane_ellen

Ellie Cole (AUS)

Event: 100m Backstroke

Disability Category: S9

Watch her in: Session 4

During her career, Cole became a six-time Paralympic champion during Rio 2016. She is also a 15-time paralympic medalist. Her career started after having her leg amputated due to cancer. Swimming was part of the rehabilitation programme and instructors found she progressed massively. She began competitively swimming in 2003 and competed internationally three years later.

Follow her Twitter @EllieVCole