Nick Hope
BBC Sport's Paralympics reporter in Rio

Ollie Hynd's parents - Helen and Darryl told me ahead of the race they were "pretty nervous" but always believed their son could win tonight.

He did that and in such dominant fashion - claiming the 400m S8 title with a world record - it's GB's first swimming gold of the Rio Paralympics.

Hynd now moves ahead of brother Sam - who retired after London 2012 with three career Paralympic medals - having secured his fourth.

Nick Hope
BBC Sport's Paralympics reporter in Rio

Ollie Hynd bounds into the mix-zone for his post-race interview with one of the biggest smiles you will see at the Rio Paralympics.

Such a contrast of emotions to London 2012 where in finished second in the same 400m S8 event.

"There isn't a day that's gone by where I haven't thought about London and it's all been about putting it right," he tells BBC Radio 5 Live reporter Kate Grey.

"I knew I needed to go out & do my own race and although I'm a little bit disappointed not to go quicker, the gold is the most important thing."

Time for some reaction from one of the British gold medallists tonight.

Here are some quotes from swimmer Ollie Hynd, who took gold in the men's 400m freestyle S8 final.

He tells Channel 4: "It's amazing. I don't think there's a day gone by when I haven't thought about what happened in London 2012 and to right those wrongs. 

"To win with a world record I've got to be happy with that. I have worked so hard for this and it means everything. I can't wait to get on the podium."

Image source, Getty Images

A credible third for Stephanie Millward, who just misses out on silver behind America's Jessica Long in the women's S8 400m freestyle.

The 34-year-old from Wiltshire won four silvers and a bronze at London 2012 and the gold medal proved elusive here.

Australia's Lakeisha Patterson, 17, produced a superb swim to comfortably come home as winner with a new world record time of 4:40.33.

Image source, PA

The British medals aren't stopping yet...

Elizabeth Hudson
BBC Sport's Paralympics reporter in Rio

Dame Sarah Storey's victory lap saw her first go over to the people who mean the most to her - her family, including husband Barney and daughter Louisa and who support her so much.

But then she took time to come over to BBC Radio 5 Live pundit Baroness Tanni Grey-Thompson whose record of 11 gold medals she has just broken and the two Paralympic legends share a warm embrace.

One of those gold medals came from Dame Sarah Storey, the 12th Paralympic gold medal in her career to become the most successful female British Paralympian ever.

Relive the historic moment, by watching the action below as Storey defeats fellow Brit Crystal Lane to take women's C5 3,000m individual pursuit gold.

Two hours ago Great Britain had no gold medals at this Paralympics. Now they have four. After a crazy two hours of competition.

The medal table is a great sight for British fans.

What a night it has been so far, and the fun keeps on coming so don't go anywhere.

These are the next British competitors to be in action in Rio.

22:00 - Will Bayley (table tennis, men's singles class 7 group match)

22:00 - Sara Head (table tennis, women's singles class 3 group match)

22:11 - Polly Maton (athletics, women's long jump T47 final)

22:12 - Harriet Lee (swimming, women's 100m breaststroke SB9 final - pictured)

22:54 - Samantha Kinghorn (athletics, women's 100m T53 final)

23:11 - Bethany Firth and Jessica-Jane Applegate (swimming, women's 100m backstroke S14 final)

Image source, Getty Images

And it took a while to confirm poolside but Hynd's time of 4:21.89 is a new world record!

Steve Bate and Adam Duggleby hold a lead of 1.8 seconds at the moment.

Image source, PA

Jonnie Peacock storms away from the rest of the field as he clocks an impressive 10.81 seconds - a new Paralympic record. 

If you're going to defend your title, that's how you do it, by completely dominating your first heat!

And over at the athletics, we're moments away from Jonnie Peacock's T44 100m race as he paces along the start line ready for his call up. 

Great Britain's Steve Bate, 39, could well become a Paralympic gold medallist in the next 10 minutes. Here is a bit more information about him.

He has retinitis pigmentosa, which means he has a 10% field of vision.

"When I first got the confirmation in 2011 they said the worst-case scenario was you could be blind in five years," he said. "To give an example, it's like looking through two straws.

"But five years on and I still have some vision. Each person I've spoken to with retinitis pigmentosa has gone blind after five years."

Bate, and pilot Adam Duggleby, take on the Dutch tandem of Vincent ter Schure and pilot Timo Fransen.

Image source, Getty Images

Elizabeth Hudson
BBC Sport's Paralympics reporter in Rio

“More excited than nervous” is how Steve Bate’s wife Caroline and Adam Duggleby’s girlfriend Becky Murray told me they were feeling before this session.

They watched on in the Velodrome in the morning as their partners smashed the world record to qualify for the gold medal ride in the men’s B 4000m pursuit on their Paralympic debut.

“It’s amazing and I’m over the moon,” Caroline said. “They have had some promising results on the road but this is their best-ever performance on the track. It’s amazing to think that Steve had never even ridden on the track before he joined the British Cycling squad in 2013.”

Tonight’s race is only the start in Rio for Bate and Duggleby who also go in the time trial and road race events later in the programme.

Image source, BBC Sport

And of course, we're moments away from our first glimpse of Jonnie Peacock. 

You may well be familiar with Peacock's work. He won gold in London four years ago in the men's T44 100m and he begins the defence of that title tonight.

But, let's hear from the man himself to find out three things that you didn't know.

Swimming classification can be a head scratcher with a mix of letters and numbers but we can break it down for you. 

Each swimmer is first given a letter to represent their event followed by a number to represent their impairment group- the lower the number, the higher the impairment.

Numbers 1-10 are physical impairments, 11-13 are visual impairments and an S14 category is for intellectual impairments such as issues with reaction time and muscle memory. 

Some athletes compete in different number classes. For example, an S5 athlete may compete in the SB4 category for breaststroke events. 

This is because different strokes affect different parts of the body and have a significant impact on performance. 

Any questions, please ask away on Twitter using #bbcrio2016

Image source, BBC Sport