Jon-Allen Butterworth had his left arm amputated when he was hit by a rocket while serving with the military in Iraq.

The operation was performed in a battleground hospital.

Mark Colbourne
Paralympic cycling gold medal winner

"An absolutely explosive ride from Jon. He's punching the air and he's delighted with that ride."

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Zing!

A wonderful ride from Jon-Allen Butterworth who takes top spot with a Paralympic record of 1min 4.733secs.

Jon-Allen Butterworth is off...

Colombia's Edwin Matiz Ruiz's time of 1:06.248 is the one to beat.

Britain's Jon-Allan Butterworth is next up in the C4-5 1,000km time trial.

If you've not seen JA before - he has a terrifically groomed beard.

Not sure how aerodynamic it is mind.

We're on to rider number 14 of 20 in the C4-5 1,000km time trial - Britain's Jon-Allan Butterworth is 17th and Jody Cundy 20th.

The fastest time so far has been set by Japan's Masashi Ishi 1min 7.437secs.

Cundy's world record is 1:01.466...

Elizabeth Hudson
BBC Sport's Paralympics reporter in Rio

We've apparently got a sell-out crowd expected at the athletics stadium tonight. However, bear in mind that the entire upper tier will not be open so capacity is reduced.

The rain is staying off for the moment, which is good news for the blade runners in the T44 final, but it is distinctly overcast.

The crowd here this morning were treated to a Brazilian gold medal courtesy of Daniel Martins who triumphed in the T20 400m and they sang the national anthem with gusto at the victory ceremony.

Image source, BBC Sport

Image source, .

Britain's Ali Jawad has another attempt at 194kg in his third and final lift, but the judges say his arms were not straight.

It doesn't matter as the 2014 world champion's first lift of 190kg has guaranteed him silver.

Egypt's Sherif Osman has gold in the bag already, with his first lift of 203kg - a Paralympic record.

But he wants to break his own world record of 210.5kg.

He can't nail it with his third lift. But, because there's a world record at stake, he can take a fourth lift... and he's done it!

Image source, Reuters

We're moments away from seeing Jonathan Drane fight for a bronze medal on the mat in the men's -81kg contest against Azerbaijan. 

If you're not sure how Judo works at the Paralympics, it's for visually impaired athletes only and you'll often see the referee help the athletes 'lock up' before they start. 

The same rules seen in Olympic judo apply here. Do you know your ippons from your yukos? 

Image source, BBC Sport

Nine down of 20 in the C4-5 kilo time trial and the home crow have a leader to cheer.

Lauro Cesar Chaman of Brazil has set the quickest time - a 1min 9.423secs.

Britain's Jody Cundy, up last, generally goes just over a minute.

Image source, BBC Sport

With Jody Cundy's kilo attempt getting closer, we could see more emotion in the veledrome tonight.

After winning gold in the B1 pursuit with Adam Duggleby yesterday, Steve Bate went over to hug his wife Caroline after the medal ceremony.

He shook the medal at her and said "listen to that" (they rattle for the benefit of the visually impaired athletes) and then placed it round her neck to try on.

Image source, Reuters

Ali Jawad was born in Lebanon without legs from the thigh down, was raised in Tottenham and is a massive Liverpool fan.

His beloved Reds are in action against the Premier League champions Leicester City tomorrow - hope he can find a Rio pub with it on (and has a medal to wear too).

Meanwhile, over at the powerlifting, Britain's Ali Jawad beat his chest in confidence before upping his second lift to 194 kg!

But unfortunately only one judge saw it as a good attempt as two red lights out of three judges means it's marked down as a failure. 

Jawad's first lift of 190kg puts him in a strong position for silver behind Egypt's Sherif Osman who lifted a Paralympic record 203kg. 

Five riders have gone in the men's C4-5 kilo event, with Jody Cundy and John-Allan Butterworth of Britain to come.

The quickest so far is Jeffrey Scott Martin of the USA with a 1min 10.252secs.

Image source, Getty Images

There are plenty of stories to look out for beyond ParalympicsGB tonight. Here's a few:

American wheelchair racer Tatyana McFadden is bidding for seven gold medals in Brazil and the first could come in the T54 100m final (23:11 BST)

It will be a busy day too for Stef Reid, who won long jump silver earlier, as her husband Brent Lakatos, who competes for Canada, is set to feature strongly in the 100m T53 final (23:17).

And Brazil could be celebrating in the pool, with one of their stars Andre Brasilup against compatriot Phelipe Rodriguez in the 50m freestyle S10 event (final 22:48).

Jody Cundy will be last of 20 on track in the C4-5 kilo time trial.

His British team-mate Jon-Allan Butterworth is up 17th.

The times will be roughly one minute 15 seconds, so you've got a bit of time yet.