Great Britain's Chris Bennett is clinging to the top-12 spot he needs to make the hammer final by the quick of his fingernails.

His second throw of 70.47 is good enough for the final qualifying spot as it stands.

Team-mate Nick Miller however has fouled his second throw and all is now resting on his final effort.

Welcome to last-chance saloon.

Some people are not impressed with the Brazilian cuisine...

I think that "food matters" might be the motto on my new crest of arms.

Team GB's Becky James and Jazz Carlin will leave Rio with with two silver medals each and vastly different hairstyles than those that they sported in this publicity shot from five years previously.

Image source, Twitter

Great Britain's Charley Hull opens her Olympic campaign with a birdie on the first.

There is a three-way tie at the top of the leaderboard with Chinese Taipei's Candie Kung and Spanish duo Azahara Munoz and Carlota Ciganda in a share of the lead.

Three heats to go and Great Britain's Shelayna Oskan-Clarke is currently ranked as the third-fastest loser in the 800m.

Eight to go through the back door. She is looking good to be one of them.

Nick Skelton stands every chance of getting into the final after receiving a score of 13 on horse Big Star. 

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French business daily Les Echos has today, external looked into Team GB's success under the headline "Why do the British swipe so many medals?"

The paper, referencing GB's third place in the medal table at London 2012, asks: "Clearly, Britain wins, but is it really a surprise?"

To understand why Britain is doing so well this year, one needs to take a look at Russia, it notes, calling the Russian team "a direct competitor" to Team GB.

"This year, the Russian delegation was heavily penalised," Les Echos adds.

Speaking about Britain's successes in Rio, the paper stresses that the number of athletes is crucial: "The equation is simple: [having] more athletes is almost a guarantee of having more chances for medals."

Having sent 366 athletes to Rio, Team GB ensured it has more participants than at any Olympics since 1992, except for 2012 when the UK hosted the tournament, Les Echos notes.

American favourite and defending champion Ashton Eaton hits the front of the decathlon standings as he leaps out to 7.94m in the long jump.

Great Britain's Liam Heath and Jon Schofield are through to tomorrow's men's kayak double 200m final. 

Great Britain's Lynsey Sharp after winning her 800m heat: "It was a little difficult because I have not ran against those girls before but I am really happy with how I executed that race.

"I am really grateful for British Athletics. They selected me for 2012 for experience and it definitely helps. 

"I am in the shape of my life and I know it will take that for the medals but I am confident that I can get close to the times the girls are running."

Alistair Magowan
BBC Sport in Rio

Image source, BBC Sport

GB 470 pair Hannah Mills and Saskia Clark admit they've had a sleepless night as they prepare for their medal race, having all but secured the gold medal.

All the London 2012 silver medalists need to do is negotiate the course safely to confirm their place on the top of the podium.

Despite "tiredness and feeling a bit jittery" they told BBC Sport sailing reporter Shirley Robertson that they "would still race hard out of respect to their fellow sailors" where medals are still to be decided.

Double Olympic champion Robertson had one piece of advice at the end of the interview: "Go out and enjoy it."

You can watch their race live from 1705 BST on the BBC Red Button.

Image source, Getty

The AIBA - who run world amateur boxing - have admitted that there have been problems with the officiating and judging at some bouts at the Games.

"Less than a handful of the decisions were not at the level expected and consequently it has been decided that the concerned referees and judges will no longer officiate at the Rio 2016 Olympic Games. 

"In accordance with AIBA Rules the result of all the bouts will stand."

 GB's Ben Maher on Tic Tac produces GB's first clear jumping round with the best individual score so far.   

Paula Radcliffe
Women's marathon world record holder on BBC TV

I think it will be and I am hoping it will be good enough. She did everything she could.

Caster Semenya strides clear of the stress and straining going on behind her to win her heat in 1:59.31 - still four seconds off her season's best.

Shelayna Oskan-Clarke cannot quite overhaul the United States Ajee Wilson in the home straight, but her efforts are rewarded with a decent time of 1:59.67,

Will that be good enough for one of eight fastest loser spots?

Paula Radcliffe
Women's marathon world record holder on BBC TV

Semenya was allegedly asked to take the hormones to suppress her testosterone levels and put her at a disadvantage so that wasn’t fair. 

But what is also unfair is the talk about it as Semenya. It is not just her in this issue of elevated testosterone.

South Africa's Caster Semenya - the 2009 world champion - is the red-hot favourite for the 800m title after the Court of Arbitration of Sport freed her from any requirement to rebalance her elevated levels of testosterone.

She is going in the second heat alongside Great Britain's Shelayna Oskan-Clarke.

Aimee Lewis
BBC Sport in Rio

Passport? Check. Tickets? Check. Gold hat for day 12? Check. The walkway outside the Olympic Park is an array of colours, Brazilian yellow, Spanish red, traditional costumes from all over the world. Lovely. 

Image source, .

Brendan Foster
Olympic medallist and BBC athletics commentator on BBC One

That was a very, very, good performance from Lynsey Sharp. She controlled it and judged it so well.

There was good competition around her but she was always in the right place.

On paper Great Britain's Lynsey Sharp is the seventh fastest athlete over the distance this year and the fastest in her heat.

And the Scot translates paper to track as she canters away from the rest on the home straight to make Friday morning's semi-finals.