Jake Eadon: 21% is my guess today for the quiz. Hopefully the chance of rain estimation on my weather app will be similar! I'm not confident on either...

• Usman Khawaja has the highest average as an opener in Test history (68.72, min. 20 innings as opener).
• Khawaja scored 34% of his runs in the 'V' straight down the ground. His career average for runs in that area is just 14%.
• England will need to bowl out Australia's tail today. In the 'Bazball' era, they have a collective bowling average of 14.17 against batters 8-11, the second best in the world in that time, behind India's 12.20.
• Jimmy Anderson went wicketless in his first 15 overs. Only once in the last five years has he gone so long in the first innings of a Test in England without picking up a wicket.

Nick The Unit: 19%

JethroCat: On the basis that most centuries/fivefers are probably achieved more times by fewer players, I'm shooting low. 8%.

The is some blue sky overhead at Edgbaston and a bit of sun poking out from behind the slowly dissipating clouds.

The hover cover has even moved off the pitch. Fingers crossed we can get started on time.

Stephan Shemilt
BBC Sport chief cricket writer at Edgbaston

Stuart Broad said there was "no excuse" for his no-ball that bowled Usman Khawaja, one of four England errors on the second day of the first Ashes Test.

Khawaja was on 112 when Broad overstepped and will begin day three on 126 with Australia 311-5, 82 behind.

Jonny Bairstow also missed two chances behind the stumps and there was an edge past slip Joe Root late on Saturday.

"It's really frustrating," Broad told Test Match Special. "I got tight to the line and it was a close decision."

England collectively bowled 13 no-balls, their most in an innings since Ben Stokes took over as captain at the beginning of last summer. Broad was responsible for six of those, the most he has ever bowled in a Test innings.

Read more here.

Take that as a bit of a hint for those who have yet to have a go at today's ZaltzQuiz.

A reminder of the question for those who are just joining us:

Usman Khawaja and Joe Root have added further honours board entries to their collection with hundreds at Edgbaston.

In all, 813 players have appeared in men’s Ashes Tests. To the nearest percent, what proportion have taken either a five-wicket haul or scored a century (or both) in an Ashes match?

We will reveal the answer at 10:30 BST

Matthew Henry
BBC Sport at Edgbaston

Today's ZaltzQuiz surprised me when he tested it on me last night. I was way out.

OwainGlyndwr1359: Point taken. My 16.67 is now rounded up the 17%. Sorry Zaltz

Zaltz forgives you, Owain. He is nice like that.

BBC Sport has joined up with The Grade Cricketer for this Ashes series.

If you're unfamiliar with their work, Sam Perry and Ian Higgins are - by their own definition - two former Sydney grade cricketers who have a satirical take on cricket across the globe.

Today, they are impressed by Broad's 'vibes' & Stokes' 'funky' fields.

A reminder that Harry Brook is 0-5 from three overs, including one maiden, so far this innings. That's an economy rate of 1.67.

Bazball is full of surprises...

Image source, Getty Images

Former England spinner Phil Tufnell believes Moeen Ali and Stuart Broad will have a big role to play on day three as they look to take the remaining five Australia first innings wickets.

OwainGlyndwr1359: 16.67% is my uneducated, unrehearsed guess.

'Doc' in Stone: 18%

Simon: Do Teddy and Jack know what to the nearest % means?? I'll go with 10.

Fair point, Simon. Andy Zaltzman would like your answers to be to the nearest percent!

BBC Test Match Special

If you want more reaction and analysis from Saturday's play then check out the latest Test Match Special podcast on BBC Sounds

Live coverage will resume on BBC Radio 5 Sports Extra and BBC Sounds from 10:00 BST.

You will also be able to listen via this page by clicking the play button at the top once coverage is under way.

For those of you who are out and about this Sunday, you can keep up to date through the day with notifications on the BBC Sport app.

When you get a moment to check, you'll see the latest wicket to fall right on your lock screen.

Find us in your phone's app store, or if you have the app installed head to the notifications section on the menu.

Image source, Reuters

A reminder of today's ZaltzQuiz:

Usman Khawaja and Joe Root have added further honours board entries to their collection with hundreds at Edgbaston.

In all, 813 players have appeared in men’s Ashes Tests. To the nearest percent, what proportion have taken either a five-wicket haul or scored a century (or both) in an Ashes match?

We will reveal the answer at 10:30 BST.

Daniel Brettig of the Sydney Morning Herald described innings a "personal triumph" for Khawaja after previously struggling in England.

"Before Khawaja’s partnerships with Travis Head and Cameron Green, the Australians had rather made a hash of the morning, drawn into errors that spoke of the mental confusion England have caused among opponents over the past 12 months," he wrote.

"Khawaja’s innings was a triumph on a personal level, his first in England a decade after he first played a Test in the UK. It was also valuable for Australia in ways that transcended the scoreboard.

"Principally, Khawaja demonstrated that the touring batters need to stay the course in order to succeed. Unhurried in his tempo, masterful on the pull shot and safe against spin, Khawaja churned out a faithful facsimile of virtually all his runs over 18 months."

Image source, Getty Images

Robert Craddock in the Herald Sun believes Ben Stokes may regret asking for flat pitches this summer given his ageing bowling attack.

"When Ben Stokes ordered flat wickets for the Ashes he sentenced a 36-year-old Stuart Broad and a soon to be 41-year-old Jimmy Anderson to one of the greatest challenges of their careers," he wrote.

"In a five Test series spanning seven weeks – and with a relatively light recent ration of bowling – Broad and Anderson, along with the likes of Ollie Robinson and Mark Wood, may have to plough along on wickets as docile as a sleeping lamb.

"For all talk of Bazball’s batting blitz’s it just feels the bowling attack that can best hang on to the rhythms of this testing series will be raising the famous urn at The Oval.

"Stokes raised eyebrows and created a few chuckles when he asked his staff to give him eight fit fast bowlers before the start of the series.

"Now we are asking whether eight will be enough. Backs will stiffen and hearts will be broken if England continue producing these types of decks."

Image source, Getty Images