Team GB's Hannah Cockroft set four world records in the space of four hours at the British Wheelchair Athletic Association Grand Prix in Stoke.
The five-time Paralympic champion broke her own times in the T34 100 metres, 200m, 400m and 800m on Saturday.
Unfortunately for Cockroft, the records will not officially stand because the event was not sanctioned by World Para-Athletics.
"I feel a bit disappointed about that," she said. "Sanctioning takes about 90 days to apply for and the meet was only organised about a month ago."
16.71 100m (16.77 current WR)— Hannah Cockroft MBE, DL (@HCDream2012) September 12, 2020
30.06 200m (30.51 current WR)
55.98 400m (57.48 current WR)
1.49.85 800m (1.55.73 current WR)
In a year where I've barely touched a track or a gym, imagine what we can do now we're back 🤯💪 pic.twitter.com/RgAAjeBJQQ
Cockroft said she was close to not competing in the event due to the coronavirus pandemic.
"I was in two minds whether to go because of the new government guidelines," she added. "I thought: 'Why is it safe to be around 50 other athletes today if you can only have groups of six on Monday?'
"But I wanted to race and see where I was before I went back to training. Funnily enough, I ended up having probably the most successful day I've had in 10 years."
The 28-year-old also said she is unsure whether she will compete in the rearranged Paralympics next year due to the pandemic.
"Unless it is safe we will be missing people," she said. "Paras is obviously for disabled people and we are all at risk [from COVID-19]. I hope it all happens because I went to Japan for the opening of the stadium in December and, from that, I can tell they would be brilliant."