More from Jack Burnell after his disqualification: "Apparently I was disqualified two metres from the end. 

"I felt a hand on my leg and it stops me dead, I took a few more strokes and he is still on my foot.

"Words can't describe it. So much brutal hard work has gone into it and it is ruined by a couple of judges.

"We are going to put an appeal in but it will do absolutely nothing. They probably will just dismiss it.

"This is the grandest stage of all and it is ruined by a couple of judges."

GB's Jack Laugher fails to make a splash with his third dive as he falls to tenth place at the halfway stage with a score of 81.60

Update: He has just posted an extremely low 39.90 on his fifth, leaving him down in 11th place...

Top 12 go through. It's going to be a tense last round of diving. 

More from Jack Burnell: "The whole is thing a joke. I was disqualified two metres from the finish. 

"My first yellow was coming down the straight back here and I was second, no one was either side of me and he pulls out a yellow card.

"I couldn't have physically touched anyone and I got a yellow card.

"I shook my head at the guy. This meant to be the pinnacle of our sport and there are referees who haven't a clue what they are doing."

Image source, Getty Images

Jack Burnell speaking to BBC TV: "The one thing that ruins the competition is the referees. There are about 600 boats out there, that are not needed and every person on the boat has no idea what they are doing giving out cards left, right and centre for nothing."

Aimee Lewis
BBC Sport in Rio

Laura Trott still leads in the omnium. Can anyone stop her from retaining her Olympic title? It seems unlikely. 

Most of the British riders have packed up and left, this session is almost done. Becky James and Katy Marchant stuffed their kit into their rucksacks, put their cycle helmets back on and cycled out of here. What other mode of transport would they use?

Image source, .

Alistair Magowan
BBC Sport in Rio

Image source, BBC Sport

Chaos on Copacabana as Dutch fans and coaching staff go wild when they think Ferry Weertman has crossed the line first, but then quickly curtail their celebrations as they wait for the photo finish to be confirmed.

Turns out their instincts were right. The winner's coach Marcel Wouda is the happiest man in Rio as the Netherlands make it a marathon swimming double gold after Sharon van Rouwendaal's victory in the women's event yesterday. 

Image source, BBC Sport

Laura Trott clocks in at 35.253 - the second fastest time of the field behind Australia's Annette Edmondson - in the time-trial element of the omnium.

That extends her lead over Belgium's Jolien D'Hoore to 12 points with two events to go. American Sarah Hammer is 16 points back. 

Still in her hands.

Great Britain's Laura Trott attempting to extend her lead in the omnium standing with a quick time-trial stomp.

Here we go...

Image source, Getty Images

Richie Woodhall
Former world champion on BBC TV

Great performance from Nicola Adams.

She would have had a nervous wait but I think she did pretty well apart from that last round. She was pretty comfortable.

Image source, Getty Images

Nicola Adams had to contend with Tetyana Kob coming at her like a threshing machine in the final round, but she is through to the semi-finals with a comprehensive decision.

The results aren't official yet but it looks like Dutchman Ferry Weertman has been given the win in the men's 10km race after the judges study a photo finish. Greece's Spiros Gianniotis is provisionally awarded silver and Marc-Antoine Olivier the bronze.

Great Britain's Jack Burnell was right in the mix in a thrilling finish and was fifth but now appears to have been disqualified.

Matt Brannigan: Come on @NicolaAdams2012!

Ian Bradley: Swim in the sea for a couple of hours and you could throw a tarpaulin over first half dozen at the finish, incredible

Sam Holloway: It's incredible that a 10km swimming marathon can end in a photo finish! Fingers crossed that @jackburnell makes it for a medal!

We are still waiting for the final result from the open-water finish.

Richie Woodhall
Former world champion on BBC TV

Adams has just got to improve her accuracy and timing a bit in this round.

Tetyana Kob is told she needs a spectacular final round after Nicola Adams won the third round on two of the three scorecards.

Kob is making inroads when she makes it messy and chaotic.

Nicola Adams wins the first round of her meeting with the Ukraine's Tetyana Kob on all three judges' scorecards.