Lee in Sunderland: I was taught maths in primary school by Jim Watts of Northants., external

Jeremy Coney
Ex-New Zealand captain on BBC Test Match Special

"At this ground you look up rather than down. When the skies are clear and the sun in shining, the ball stops swinging."

After a single from Lyth, Cook drills Craig for four through the covers towards the White Rose Stand (the artist formerly known as the Western Terrace), that's the 150 partnership. Time for two, or possibly three more before tea?

Graeme Williams: I was taught maths by Graeme Swann's dad. He was a brilliant teacher but terrifying too! A quality batsman himself.

Kesh in London: I was employed as a teacher by the mother of Adrian, external and Robert Rollins,, external Marva Rollins. Adrian had a long county career and Robert played for England Lions. Topically, Adrian is now a maths and deputy headteacher.

Cook edges Boult for four past second slip, while a more full-blooded stroke brings him two to Henry on the cover boundary. England trail by 205.

Jeremy Coney
Ex-New Zealand captain on BBC Test Match Special

"I don't think it's without little moments to keep New Zealand's bowlers interested. They've beaten the bat a couple of times. But England are batting very well - Cook has evolved so he hardly plays the ball outside off stump at all."

Image source, AP

Sky statistician Richard Isaacs: First time since Feb 1914 that both leading Test run & wicket taker in same game for England - Jack Hobbs and Sydney Barnes.

Craig's previously excellent figures take a dent as Lyth helps himself to a three through mid-wicket. He's racing ahead of Cook, who moves to 58 with a single. Tea coming up on the horizon - at 15:40 BST - with a long final session to come.

Ben Mummery: Cook has batted for England for more minutes than Boycott - didn't think that was possible!

Liam: He's a good player but he scores too slowly, that's what puts people off.

Boult takes a tumble as Lyth whacks a four back past the bowler, before guiding a three off his legs - Matt Henry makes a good run-saving stop at long leg, pushing the ball back before tumbling over the rope himself. England enjoying themselves too.

Tom Watkins: Alastair Cook's mother was my chemistry teacher for three years from 2005-7. For one chemistry test, she promised person with the highest mark would be awarded with a signed Cook ODI shirt. Never worked so hard on a science-related subject in my life.

Actually, I was taught maths by Paul Terry's mother for a year. Anyone else been taught by a current or former Test batsman's mother?

Craig, having only conceded a miserly seven runs in his first seven overs, continues bowling round the wicket to the two left-handers - and a maiden to Cook make his figures look even better. Geoffrey Boycott may have been disparaging about Craig's abilities for the last two Tests, but he's been right on the money for the Black Caps so far today.

Marko Koning: Cook is the medicine. When he is doing well, England is doing well. Just in time for the Ashes. Bring it on!

New Zealand need to put the brakes on here, with four front-line bowlers they've not got a lot of options so turn back to their premier bowler Trent Boult at the Football Stand End. He brings them some control with five dot balls, although Lyth manages to steer the last delivery through the covers for his ninth four.

There's five ODIs and a T20 international for New Zealand to get through after this Test, they'll be home before the end of June and then have a month off before heading to South Africa in early to mid-August.

Former England batsman Kevin Pietersen: "I was quoted a few years back saying could break Sachin's record. At the age of 30, he still has a chance! Quite brilliant batsman! Well done, AC!"

Suddenly the shackles appear to be off as Craig lets one go too short and Cook remorselessly square-cuts him for four. Just 27 more needed for England to avoid the follow-on (he said with his tongue firmly in his cheek).

Image source, Getty Images

David Brooks: I think we can do better with bowling wicketkeepers (see 13:59). How about George Brown, the great Hampshire all-rounder who scored 18,000 runs and took around 600 wickets for them with fast-medium but who kept wicket when he played for England. And then there's the great Kiwi John Reid, a true all-rounder who also kept wicket in tests. I'd also add Hanif Mommamad's leg-spin. The more difficult question is who keeps wicket for this team?

A flashing four, sliced over the slips, brings Alastair Cook his 41st Test fifty - and as I mentioned, his fifth score in excess of 50 in his last seven Test innings. A single brings Lyth on strike, it's hearts-in-mouths time for the Yorkshire crowd as their opening batsman nearly pops a return catch to Henry but it's just too low for the big Canterbury seamer and bounces just in front of his grasp as he tumbles onto the wicket. Reprieved, Lyth helps himself to a two before an assured square-driven four takes him to 59.

Andrew Samson
BBC Test Match Special statistician

"Joe Root has got 2,272 runs in Test cricket, at the same age Alastair Cook had 2,238. So he is on course, almost."

Image source, Reuters

Cook is edging, tortoise-like, towards his fifty. Just a single from another Craig over of tempting off-spin.