No rush from Sciver - she only gets to face the last ball of the over, and tickles it for one to move to 99. The crowd awaits...

Time for the powerplay - and with no-one back at long-on (an odd decision with Mir bowling off-spin round the wicket), Knight launches her second six of the innings over the unguarded boundary. She's into the 90s too.

Sciver is inching towards three figures - up to 98, but has to wait a little longer as the captain (having failed with another reverse-sweep attempt) farms the strike off the final ball.

Here's that deft reverse-sweep from Heather Knight which preceded her six:

No sign of "must do this in one hit"-style nerves from Natalie Sciver as she and Knight are happy to push the singles and wait for the bad balls to hit. A better over from Nashra yields just three singles - while Knight survives a yelled lbw appeal as she is hit on the pad while sweeping, but the impact was clearly outside the line of off stump. Good decision by umpire Chris Brown.

Louise Davis: Not a fan of the boundary boards at #ENGvPAK, external. Can only see half the playing surface. What's wrong with just having Toblerones?

Single from Knight, then Sciver aims another big hit but can't connect cleanly and a single takes her to within one hit of that century.

Charlotte Edwards
Ex-England captain on BBC Test Match Special

Pakistan don't seem to have learned from very similar matches where they lost in England last summer. There's no clear plan.

Eng 210-2published at 32.4 overs

32.4 overs

Knight 82 from 87 balls

Still no sign of an early powerplay. Heather Knight has been driving well all day, first reverse-sweeping Sadia for four, then really gives it a whack as a slog-sweep over mid-wicket brings up the first six of the day - and her highest ODI score.

Charlotte Edwards
Ex-England captain on BBC Test Match Special

We'll learn a lot about Nat Sciver in the next few balls - some players like to get to 100 in one hit and others like to be safe and nudge it around for singles.

Kainat takes a break with two overs up her sleeve, and it's left-arm spin from both ends as Nashra Sandhu - who's got less of a textbook action than Sadia - rejoins the attack. More strike rotation from England as the boundary sweepers are kept busy, and off her 67th delivery. Sciver can only steer the ball to mid-on with her score on 92 so Karen Rolton can rest easy for another day with her record intact.

Here's some back-to-back boundaries from Sciver from a couple of overs ago:

Natalie Germanos
BBC Test Match Special commentator

Neither of these two have an ODI century to their name so that will be on their mind.

Knight's previous best ODI score is 79 (though she's scored 157 in a Test) - while this is already Sciver's highest international knock.

150 partnershippublished at 31 overs

31 overs

Eng 194-2

The cap-wearing left-arm spinner Sadia Yousaf resumes proceedings post-drinks, and is charged with a wide - Pakistan have sent a few down today. But then there's a wonderful unorthodox boundary from Sciver as she skips across to the off side and lofts Sadia over deep backward square leg for four to an unguarded boundary - that's the 150 partnership. A single takes her to 90 from 63 balls, is the Rolton record on the line?

Phil Long
TMS statistician

Nat Sciver is currently 85 off 59 balls. The record for the fastest ODI century is Karen Rolton's 67-ball knock.

I thought the players had only taken drinks three overs ago. By the looks of it, that was an unofficial drinks break - this is the real McCoy. Even umpires Chris Brown and Jacqueline Williams take on some fluids.

It seems a long time since these two came together when Tammy Beaumont was caught behind...

Kainat into her eighth over and Knight goes aerial, lofting her for a one-bounce four through long-off. It's looking like a good toss to have lost.

I wonder if they've thought about taking the batting powerplay, which would force Pakistan to bowl some of their better bowlers earlier than they'd planned?

And, touch wood, despite a minor forecast of doom earlier, the rain has stayed away from Grace Road so far.

David Wallace: I'm sure I remember that Nat Sciver has played cricket among the high snows of Mt Kilimanjaro.

Heather Knight has played cricket on Kilimanjaro - her team beat a side led by ex-England spinner Ashley Giles.

There's a minor sense of desperation in the way that Pakistan switch the bowling around again - time for a second spell for left-arm spinner Sadia Yousaf. But she strays with her line as Knight expertly bisects the two backward point fielders - both of whom indicate that they thought the other one might have stopped it - for four. The skipper has 62 from 77 balls, Sciver has 83 from only 56.

Here are those four successive boundaries from Natalie Sciver from the 23rd over - surely she's one of the most exciting talents in the women's game nowadays?

While captain Knight is anchoring this innings well, Natalie Sciver fits the aggressor's role perfectly - powering the recalled seamer Kainat for back-to-back boundaries, one drilled through extra cover and one pulled brutally through mid-wicket. This is now her highest ODI score - and the schoolchildren watching are absolutely loving their day out. Let's hope it inspires a few of them to strap the pads on in the future.