Ian Gillian: What a delight and relief to see KJT projecting certainty for the first time at a major championships.

Ellie: Petition to start calling Katarina Johnson-Thompson the Notorious K.J.T.

Right, straight back into the fray and a proper intriguing final.

Nethaneel Mitchell-Blake and Adam Gemili were both part of the British 4x100m team that claimed gold in London.

Individually though they have both tasted major championships missing out on podium places last summer and at Rio 2016 respectively.

Neither looked super strong in the semi-finals.

The world champion Ramil Guliyev, Switzerland's Alex Wilson and Spain's defending champion Bruno Hortelano are real threats.

Look out for Leon Reid, finally confirmed for Ireland, in lane eight.

Katarina Johnson-Thompson speaking to BBC Sport: "I wasn't sure what to expect at this competition or what would happen. To get pretty much a season best in each event, I'm happy with that.

'I've been in two minds about it, I've not been nervous but I was aware that the competition has got a lot stronger and I needed to up my game - but also not to be afraid of anybody because it's my own performances and I have my own strengths.

"I just hope to continue and do one event at a time."

Image source, Getty Images

Allison Curbishley
BBC athletics expert on Radio 5 live sports extra

KJT is almost 6ft and she is looking lean and mean.

She is looking like a different athlete. She is looking the part and we are going to see a battle all the way to the 800m.

You've got two athletes who are both going for their own little hat-trick, KJT wants to add to her World Indoor and Commonwealth Games titles and Thiam her Olympic and World gold.

This is practically the World Championships for heptathlon.

Well, look here.

Katarina Johnson-Thompson takes an 87-point lead into second day of competition.

And the long jump is next up. Is there a shock brewing here?

Image source, x

Holly Bradshaw has chosen to skip the last height of 4.70 and has slipped to joint fourth overall.

The pressure is now on for her to clear the next height, which is 4.75, to stay in contention.

And that is good enough to take her into overall lead after the first day's competition!

A superb run, spurred on by the competition from Germany's Louisa Grauvogel alongside her.

That is just a tenth away from the personal best she set in Gotzis back in 2016.

Big. Real big.

Time to see what the Briton can do...

Daley Thompson
Two-time Olympic decathlon champion on BBC Radio 5 live

Katarina will look up at the screen and want to know what Thiam ran.

She can easily run a second faster than Thiam and close the gap on her.

Our girl is in great shape and it's about asserting herself. Hopefully she can run in the low 23s.

Colin Jackson
Two-time world 110m hurdles champion on BBC TV

Nafissatou Thiam isn't blessed with natural speed, everything she gets is from her tall frame - including her range of movement - but she'll be disappointed because she's way off her best.

Heptathlon leader Nafi Thiam has just gone in the third and penultimate 200m race in the heptathlon competition.

The Belgian world and Olympic champion runs in fifth in 24.81. That is short of her best.

She is two tenths down on her season's best of 24.61 and more than four tenth off her personal best.

A chink of light for Katarina Johnson-Thompson to prise open the competition?

Allison Curbishley
BBC athletics expert on Radio 5 live sports extra

We don't get long in this sport. If you get two Olympic cycles you're lucky, especially with the stresses and strains of the pole vault.

Holly has promised for so long. Of course we have the Americans but in Europe this is a strong event, and Holly at her best can be medal-winning.

Holly has always had a problem with the countback so clearing those first two attempts first time will give her confidence.

Dame Jessica Ennis-Hill
London 2012 Olympic heptathlon champion on BBC TV

Reflecting on Dina Asher-Smith's 100m victory...

Dina Asher-Smith is so incredibly strong, she's very level headed and focused and she dominated the race from the start. She powered through and it was just really inspiring to see how she came out and performed off the back of what was a really horrible injury.

Some nice shots of Great Britain's Dina Asher-Smith picking up her 100m gold medal last night.

The 22-year-old gamely tried to keep up with a operatic rendition of the national anthem.

It was the full Mariah Carey eight-octave showcase.

Image source, .

• GB's Jack Laugher wins his second diving gold with victory in the 3m springboard final
• Ben Proud wins gold in the 50m freestyle to start GB medal rush in the pool
• Adam Peaty leads GB to gold in 4x100m medley final - and secures his fourth title in Glasgow
• Fellow swimmers Imogen Clark & Max Litchfield take silvers, and James Guy, Molly Hibbott & GB women's relay team claim bronzes
• Matthew Dixon and Noah Williams secure 10m synchronised silver
• Triathlete Jessica Learmonth takes silver in the women's event

Thomas Barr speaking to BBC Sport after winning bronze: "I can't believe it. I really, really cannot.

"It's ridiculously sweet - it's pretty much two years in the making and it's probably one of the fastest times I've ever run - I just pulled it out on the right day."

Image source, Getty Images

Next up, is a chance for Katarina Johnson-Thompson to nibble into the 100-point lead that world and Olympic champion Nafi Thiam has over her.

Their respective personal bests over the half lap are 22.79 and 24.40.

Just as important might be the performance of Germany's Carolin Schafer, whose personal best is 23.27 seconds. She is third, 83 points behind KJT.

Image source, Getty Images

Here's Holly's first clearance - plenty of room to go higher.

Holly Bradshaw is flying in the early stages of the pole vault final.

The British record-holder has cleared her second height (4.65) at the first attempt.

She is currently sitting in a five-way tie for the lead.

Clearing heights in as few attempts as possible can prove vital in the event of a count-back when athletes are tied later in the competition.

Bradshaw's personal best is 4.81.