Bush was selected to be alongside them in Japan, but suffered a knee injury shortly before the Games and was ruled out.
It was the second Games he missed because of injury. Bush had thought his first appearance at a Paralympics would come in 2016 when he was Britain’s top male thrower in the F46 javelin, but a shoulder injury ruled him out of Rio.
He subsequently switched to taekwondo and has won two world titles – and now the 35-year-old is ready for the biggest stage of all, although he is taking nothing for granted.
“I don’t know how lucky it’s going to be until I get there,” he told BBC Sport. “I was close in Tokyo – I qualified, got selected and was right on the doorstep [before injury], so hopefully I get to go this time.”
He isn’t letting concerns about his fitness affect preparations, having won a bronze medal at the European Championships in May.
“It’s just part of sport,” he said of injuries. “They can happen at any time, when it doesn’t have such a big impact – then sometimes it does.”
Bush, who qualified automatically for the Games as one of the top six-ranked male athletes in the world in the +80kg category, says family helped keep him level-headed through his previous Paralympic disappointments.
He still works for the family business distributing cheese and other dairy products around Wales, and also helped out with food deliveries around his native Carmarthenshire during the Covid lockdown.
“It’s really important to have things outside the sport, people can make the mistake of having their identity in the sport, then you don’t have any frame of reference,” he said.
“You have ups and downs in your career, when things are down then everything is down. I have some constants, which from a mental health perspective is very positive.
“I have a perspective that nothing is a given. It’s good I get to train today, it will be great if I get to the Paralympics, but everything is good anyway.”