|Paralympic Games on the BBC|
|Venue: Tokyo, Japan Dates: 24 August-5 September Time in Tokyo: BST +8|
|Coverage: Follow on Radio 5 Live and on the BBC Sport website|
Britain's Kadeena Cox retained her C4-5 500m time trial Paralympic title with a stunning world-record ride in Tokyo.
The 30-year-old, who won cycling and athletics gold at the 2016 Rio Games, knew she had to beat the time of 35.830 seconds set by Canadian world champion Kate O'Brien to win Britain's seventh gold of the Games.
And she smashed that with a brilliant 34.812secs - beating the old record by 0.411secs.
"I knew I was going to have to do something special, and that if I put everything together that me and my coach had worked on, it would be amazing," she said.
"I executed a race that was near-perfect - I'm so happy."
In the pool, Hannah Russell and Reece Dunn both landed gold on another successful day for British swimmers.
Russell held off the challenge of Russian Daria Pikalova to retain her S12 100m backstroke title.
Dunn, who finished second in the S14 butterfly on Wednesday, won his first Paralympic gold in the S14 200m freestyle.
Bethany Firth failed to retain her S14 200m freestyle crown, finishing second, with fellow Briton Jessica-Jane Applegate taking bronze.
There was also a bronze for Stephen Clegg in the men's S12 100m backstroke.
Natasha Baker won Britain's fourth Para-equestrian medal in Tokyo, taking silver in the Grade III individual test on Keystone Dawn Chorus, known as Lottie.
The pair scored 76.265% with gold going to Denmark's 21-year-old Tobias Jorgensen and his mount Jolene Hill (78.971).
Earlier in the velodrome, Britain's Jaco van Gass claimed his second medal of the Games with bronze in the C1-3 1000m time trial.
The pursuit gold medallist set a new world record in his C3 category, but it wasn't enough for victory.
There were also bronzes on day three for the men's wheelchair fencing epee team of Piers Gilliver, Dimitri Coutya and Oliver Lam-Watson, sprinter Maria Lyle in the opening session of the athletics competition and for powerlifting debutant Olivia Broome.
It was a second medal of the Games for both Gilliver and Coutya and a first for Lam-Watson on his debut.
Lyle finished third in the T35 100m in 14:18 seconds as China's Xia Zhou set a new world record of 13:00 while Broome had a best lift of 107kg in the -50kg event.
Broome's team-mate Ali Jawad finished sixth in the men's -59kg event after a build-up where his training was not only affected by Covid-19 but also by the Crohn's disease which he deals with on a daily basis.
Cox deals with 'tricky' conditions
Cox goes again in Saturday's team sprint alongside Van Gass and Jody Cundy before switching sports and aiming to retain her T38 400m title on the athletics track next Saturday.
After having a stroke in 2014, she was then diagnosed with multiple sclerosis and had to rebuild her sporting career.
After her Rio heroics, where she became the first Briton to win two golds in different sports at the same Paralympic Games in 28 years, she has had to deal with a number of injuries and has had issues with what she referred to as "disordered eating".
The Tokyo heat has also presented her with a big challenge.
"I'm heat intolerant and it is tricky out here," she said. "It has affected my muscle spasms and my speech.
"It's a little bit of a struggle and it will take me a bit longer to recover, which hopefully isn't too long because I've got another race tomorrow."
Cox, who has 11 siblings, says that she has spent most of her time travelling between cycling training in Manchester, athletics training in Loughborough and family in Leeds. She is feeling the support of her network of family and friends who have been unable to travel to support her, plus her Christian faith.
"It's been completely different, she's not had any of us with her," her sister Carmel Williams told BBC Breakfast.
"We're such a strong family, so to not have any of us with her is a big thing.
"So just providing that support, we've sent her loads of videos, just so that she can feel that she has our support, which obviously she does. She was watching them before the race to help her focus - and she won, which was great."
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Other Britons in action
Six-time Paralympic gold medallist David Weir found the going tough in the heats of the T54 5,000m and failed to qualify for Saturday's final.
Jack Hunter-Spivey (class 5), Tom Matthews (class 1) and Paul Karabardak (class 6) are guaranteed table tennis medals after reaching the semi-finals.
The wheelchair rugby team, who were already guaranteed a semi-final spot, lost 50-48 to the USA in their final pool game and will face Japan in Saturday's semi-finals (06:15 BST).
On the opening day of action in the rowing, Britain's Lauren Rowles and Laurence Whiteley set a new Paralympic best to reach Sunday's final of the PR2 mixed double scullst, while the PR3 mixed coxed four also did the same.
However, Ben Pritchard in the PR1 men's singles sculls will need to finish in the top two in Saturday's repechage to get into the final.
Archer Jess Stretton set a new Paralympic record to top the rankings in qualifying for the women's compound open event.
But the men's wheelchair basketball team lost 71-59 to Germany with player-coach Gaz Choudhry top-scoring on 14 points while the women suffered their third defeat out of three - 53-35 to Germany - and face a must-win game against Australia on Saturday (12:30).
Poland's Marcin Polak, who won bronze in Wednesday's B 4,000m individual pursuit with pilot Michal Ladosz, has been provisionally suspended by the International Cycling Union (UCI) after testing positive for the banned blood booster EPO (erythropoietin).
Polak will be unable to compete in Saturday's B 1000m time trial and the upcoming road events.
"The consequences on the bronze medal he obtained will be determined by the relevant disciplinary panel," said a statement.
American blind long jumper Lex Gillette failed in his bid to win a long-awaited T11 long jump title, finishing with silver for the fifth Paralympics Games in a row.
The 36-year-old managed a best of 6.17m but was beaten by China's Dongdong di (6.47m).
Abbas Karimi of the Refugee Paralympic Team marked his Games debut with eighth place in the final of the men's S5 50m butterfly.
The 24-year-old was born in Afghanistan, missing both arms. He left aged 16, fleeing first to Iran and then Turkey before settling in the US in 2016.
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