Here's how Trent Boult ripped through England's top-order a little earlier.

(Alex Lees' reaction sort of sums it all up.)

Jonathan Agnew
BBC cricket correspondent on Test Match Special

England are going at five an over but have lost four wickets. It's exhausting.

Jonny Bairstow pulls. It finds the bottom edge and whistles past Blundell behind the stumps. Four more. Relentless scoring.

Time for drinks. This session has been, well, ridiculous. No other word for it.

Another boundary. Ben Stokes is in full control of this one. He takes a step forward and places it through the gap at point. Perfectly timed.

Jonathan Agnew
BBC cricket correspondent on Test Match Special

That flew down to third man and was fielded by a nun.

Alex Hartley
England World Cup winner on BBC Test Match Special

It doesn't feel like we are watching a Test match.

Short from Trent Boult. Ben Stokes takes a few steps forward and slaps it into the the off side. Four more.

Matthew Henry
BBC Sport at Headingley

I’ve just spotted Geoffrey Boycott in the posh seats. Not sure I’m brave enough to ask him what he made of those England dismissals.

Southee varies it up with a slower ball which invites a play and a miss from Stokes. The England captain strides down the pitch again but this time clips into the leg side for a single.

My word - England are living on the edge! Jonny Bairstow flashes at a short and wide one which is just out of reach of the slip cordon and races to the boundary.

The shackles are off Ben Stokes and Jonny Bairstow. And I have a feeling they'll never be put back on.

Like it or loathe it, you're certain to be entertained.

Daniel Norcross
BBC Test Match Special commentator

Wow. You can forget patience. Stokes has faced three balls and come down the track to two of them.

Eng 37-4published at 9.2 overs

9.2 overs

Ben Stokes jigs down the pitch and launches Southee back down the ground for six.

What on earth is Test cricket about these days?

Alex Hartley
England World Cup winner on BBC Test Match Special

Stokes and Bairstow have to be patient. Can they see off Boult? I wouldn't be surprised if we see a lengthy spell from him.

Andy Zaltzman
BBC Test Match Special statistician

Trent Boult is just the third player to bowl three batters inside the first eight overs of a Test innings after George Lohmann against Australia at Old Trafford in 1888 and Jack Saunders at the Oval in 1902.

He is also the 11th player to bowl the opposition's top three batters. The last time it happened in England was Trevor Bailey against New Zealand at Old Trafford in 1949.

Trent Boult bowls a rare poor delivery. Full and wide. Drilled through the covers by Bairstow for four.

And again! Pretty much a carbon copy of the first boundary.

In case you care, my figures are currently 6-31 from 10.5 overs since taking on the live text chair.

James Buxton: Oh dear.

Daniel Norcross
BBC Test Match Special commentator

New Zealand have given England a lesson on how to bowl at Headingley.

Ben Stokes is in and off the mark with two. Oh how they need another Trent Bridge-eque partnership between the England skipper and Johnny Bairstow.

Matthew Henry
BBC Sport at Headingley

You can feel the disappointment around Headingley as Joe Root slumps off. Yorkshire’s favourite son is out.

Daniel Norcross
BBC Test Match Special commentator

Oh my word. This is super bowling from Tim Southee.

It was full and straight but just nipped away from Joe Root at the last moment.

England right up against it.