Geoffrey Boycott
Ex-England batsman on BBC Test Match Special

There's a nice applause there for a very well-crafted innings. There's also a bit of it for the debacle at Lord's, where some of the team played awful shots. He didn't, but there's relief there.

100 for Cookpublished at 15:25 British Summer Time 22 July 2016

15:25 BST 22 July 2016

Fist-bumps, we have fist-bumps! Cook gets to his 29th century with an on-drive for two off Amir, and then the crowd rises as he pumps out the celebration. Helmet off, bat raised.

Is that a half-and-half cricket top? I thought I'd seen it all.

Root has had enough of the waiting around by the looks of it. He brings out the slog sweep against Yasir and, unlike at Lord's, it earns him a four.

Right, forget the post-lunch slumbers. This Old Trafford crowd has woken up. And it's probably no surprise as Mohammad Amir has come on to bowl a new spell. The modus of every delivery is a rising chorus all the way through the run-up before a huge shout of 'no-ball' at the release. A tempestuous opening.

Cook piles on the misery with an expertly judged open-faced guide down between third slip and gully, and it trickles to third man for four.

Remember the Cook that played a one-day-esque innings at Lord's? He's motoring on here as well, for this session anyway. Another four for the England skipper and it's another drive off Yasir. As if in response to the previous over, Wahab gives chase at the point boundary but can only watch it crash into the ropes. Wahab does a very nice impression of a 100m sprinter's finish, letting his head lead the way.

Andrew Samson
BBC Test Match Special statistician

This is England's highest second-wicket stand in a Test at Old Trafford, beating the 137 added by Marcus Trescothick and Michael Vaughan against Australia in 2005.

If anyone ever sees an incredibly sweaty person walking away from Old Trafford with a massive backpack, contact Michael please.

Clever shot from Cook as he cuts away off a ball that kept low from Wahab. The ball runs away behind point and Yasir gives chase. The Lionel Messi-lookalike does a very bad impression of a celebratory dive, as he misjudges the pace of the ball, and it deflects away for four.

Michael Vaughan
Ex-England captain on BBC Test Match Special

My theory on the Cookie Monster is that he shouldn't be here. He should be at work or somewhere else. But, he dresses as the Cookie Monster and no-one ever knows.

Is that like a reverse-mockers call from Andrew? Would you be scared if the stat said people have always converted an 80 into a century?

Yasir tweaks out his 16th over and gives away four. I can hear the crowd chanting something along the tune of "he's got the whole world in his hands". Any suggestions as to the actual chant being belted out?

Andrew Samson
BBC Test Match Special statistician

The last 10 times anyone in the England top five has got to 80, only once have they gone on to make a hundred.

I've been noticing that Wahab's got a very wristy, flowing sort of action at the point of release. Should ideally make for a bit of swing, yes? Not much hint of that yet from the bowler, although I think he's doing better with his fuller deliveries than his shorter ones.

Ghost Writer: Dice cricket was the game that took over rainy summer days when we were kids. Just don't roll a 5 !!!!!

Both Cook and Root easily picking Yasir with ease. Cook, in fact, strokes one through cover. Another delivery that was full from the leg-spinner - he's done that a few times today and suffered. A few more drinks on the field, an impromptu break as Cook gets some tape put on the bottom of his bat.

Vic Marks
Ex-England spinner on BBC Test Match Special

It's interesting looking at Yasir's pace. It's about 55mph, which is pretty quick for a spinner. Monty Panesar bowls at that pace.

Mike, I reckon the drinks break during cricket in the Antarctic involves something much, much stronger than water. Also, how can you ever be bored of counting penguins?

Meanwhile, Wahab continues the grunting trend among Pakistan's seamers. He sends Root ducking a bit with a good bouncer as well. Just to let him know he's not completely flagging.

Mike Stevenson: Impromptu cricket? Minus 35C in the Antarctic 1992, bored with counting penguins. Whale bone for a bat, 3 ski poles for wicket.

Cheers and hoots heard from the crowd. Not sure why. Is there a sabre-tooth tiger playing the banjo? If not, I'm a little less interested.

Yasir comes in from the members' pavilion end, the two antique towers dwarfed by the new swanky buildings around it. The Pakistan leg-spinner's been dwarfed in this match so far. Not much success, barring that one edge off Cook's bat that flew past slip. Cook and Root take a run each.

Michael Vaughan
Ex-England captain on BBC Test Match Special

It's gone very well for England. The pitch is a belter. There's been some shape in the air, but no spin. It's one of those days where batsmen have to give themselves chance to make runs. Pakistan have to go full or short - yorkers and bouncers.