Pakistan survive tricky late spell to reach 21-0
England recover from 145-5 to end with 50-run first-innings lead
Classy Brook hits third century in three Tests (111 off 150 balls)
Foakes offers support with steady 64 off 121 balls
Stokes run out after mix-up with Brook
Pope hits 51 before being bowled by Abrar
Nauman removes Duckett for 26 & Root (0) in consecutive deliveries
Image source, Getty ImagesJust getting to know England's newest run machine Harry Brook?
Here's a piece from earlier in the summer by my colleague Stephan Shemilt on the making of the Yorkshireman.
It tells the story of his cricket background and how his grandmother loves doing his washing.
Alex Hartley
Former England bowler on BBC Test Match Special
Harry Brooks numbers against Pakistan are outstanding. In the PSL he averaged 50, just before the T20 World Cup he averaged 80 and now in Test cricket in Pakistan he's averaged 115.
Simon Mann
BBC Test Match Special commentator
Pakistan have got some work to do here. It's still anyone's game. Brook has done the job that Stokes asked of him when he got run out.
England trail by 50
There is little threat from Salman Agha as England add five more runs to the tally to complete a highly satisfying session for the tourists.
That disastrous run out of Ben Stokes could have triggered a collapse, but Harry Brook showed superb composure to put that mix-up to one side and score a superb Test century.
Unsurprisingly Stokes is the first player to congratulate Brook as he heads up the stairs and into the England dressing room.
He and Ben Foakes have put on 109 to move England to within 50 runs of Pakistan's first innings score.
A change of bowling as we head towards the tea break - Salman Agha is on for the first time this innings.
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Andy Zaltzman
Cricket statistician on Test Match Special
Image source, PCBHarry Brook is just the sixth man to score three or more hundreds in his first four Tests.
The others are George Headley, Arthur Morris, Conrad Hunte and Sunil Gavaskar and Mohammad Azharuddin.
Trail by 55 runs
Fresh from reaching three figures Harry Brook makes a bit of a mess of a reverse-sweep. The ball disappears through his legs, narrowly missing the stumps, before flying down to third man where it is clawed back just before the rope and England run three.
A touch of fortune for Brook there.
Alex Hartley
Former England bowler on BBC Test Match Special
What's really impressed me there with Brook trying to get to his 100 is Abrar has been trying to pitch the ball outside leg stump and as soon as he gets it slightly wrong, Brook gets on his back foot and punches him through the off side. It's clever batting.
#bbccricket
Thomas Banks: We have someone very, very, very special on our hands with Harry Brook. What happens to YJB now?
Simon Mann
BBC Test Match Special commentator
He's played magnificently. There's a strong argument for saying that he is the best of the lot.
Harry Brook is a very good cricket player. This is his third century in as many Tests on this tour and how England needed this one.
It is short from Abrar Ahmed and Brook pushes the ball through the covers to the boundary.
There is a huge smile on Brook's face as he raises his bat to the England balcony. But he quickly puts his helmet back on to prepare for the next ball. He knows there is a job to do.
Andy Zaltzman
Cricket statistician on Test Match Special
When Brook reached 95, it's the most runs by an England player in an away series against Pakistan, that includes series in the UAE.
Text 81111
I’d like to see the live text commentary of Gilbert Jessop’s century, I’d imagine it was full of 1902 ramps and switch hits. Alec Stewart would be a good addition for a Bazball XI.
Foakes 38, Brook 97
Pakistan think they have Ben Foakes caught behind sweeping down the leg-side - but umpire Joel Wilson calls a wide and Babar Azam opts against the review.
A bit of gamesmanship from Mohammad Rizwan behind the stumps there?
A single for Harry Brook moves him on to 97.
Simon Mann
BBC Test Match Special commentator
If Brook does reach 100, you can argue that it's his best hundred so far because of the circumstances.
England trail by 69
More nifty footwork from Harry Brook as he nudges the ball wide of mid-on for two.
A single moves him to 96 - a third Test century is edging ever closer.
Simon Mann
BBC Test Match Special commentator
This is becoming a worrying partnership for Pakistan.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
Brook average is 111 runs in this series. He's having a terrific time.
Image source, Getty ImagesHarry Brook dances down the track again and lofts the ball over mid-on, but the ball bounces just short of the rope and is clawed back by the fielder and England run two. Brook into the 90s.
A single brings Ben Foakes on strike and Nauman Ali gets one to spit up out of the rough. Foakes just about manages to fend it away off a leading edge and it lands safely.