That boundary seems to have kicked New Zealand back into gear and they take 10 from Root's over.

A freebie from the part-time spinner is slapped away behind square as Williamson moves into the 90s.

Blundell ends the over with a bit of hack, not timed at all but he gets a single into the leg side.

Play and a miss from Blundell to start Broad's over. A leg-cutter that bounced a bit more than the batter expected.

England have done a good job at drying up the runs in the last few overs but Blundell ends this one with a boundary, punched superbly through the covers.

Joe Root replaces Jimmy Anderson, who bowled a miserly spell pre-drinks, and a couple of singles take New Zealand's lead past 150.

He has had a couple of mentions, in fairness. But I agree, Mr Radio, I'm surprised he's not had more.

Perhaps people just see him as an honorary Englishman now.

I nearly wrote 'one of our own' but stopped myself. One of my least favourite chants from the football terraces...

Pressure Drop Radio: An astonishing lack of support for Brendon McCullum in the favourite Kiwi cricketer nominations! His incredible leadership of the Black Caps inspired the England white-ball teams out of the dark ages and on to world domination.

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It's been a very good hour for New Zealand since lunch. Blundell and Williamson are still there, both looking in good touch.

For England, the good news is that the lead is still only 149. Two quick wickets and they're into the tail.

Hard to say whether this is conventional or reverse swing - I'd say the latter if pushed - but Broad is getting a bit of tail into the right-handers, too.

He is, perhaps intentionally to find that shape, bowling a bit slower so it might be conventional swing.

Basically, I don't know. And on that note, it's time for drinks.

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Daniel Linton: My Kiwi favourite is a little left field. Mark Greatbatch but only because his name resembled dangermouse's arch enemy - in fairness he could bat too!

The ball is shaping nicely for Anderson, just a little bit in either direction, but combined with his ever-impressive accuracy, it is making him extremely difficult to get away from around the wicket.

Just a single from the over. Now we're going to see Stuart Broad turn his arm over again.

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Our colleagues at Cricviz have some interesting insight for us, which shows how this pitch has flattened out.

There has been considerably less swing movement for the English pacers with the second new ball.

With the first new ball in the first 15 overs, England's pacers got 1.15 degrees of swing movement. With the second new ball in the first 15 overs, England pacers got only 0.50 degrees of swing movement.

In addition, The PitchViz rating has been the lowest for any day in this Test for pacers so far (the higher the number, the harder it is to bat on)

• Day 1: 6.3
• Day 2: 6.6
• Day 3: 6.9
• Day 4: 6.0

A pair of threes to end Leach's over with Williamson guiding the ball wide of slip to give Anderson a chase, then Blundell flicking the ball nicely through mid-wicket.

England have generally managed to keep New Zealand's scoring rate down, that's kept them ahead of the game but after so long in the field, a wicket or two wouldn't go amiss.

Anderson is able to sneak one through Blundell's defences and hit him on the back leg.

There's an lbw appeal as the ball runs away for a couple of leg byes but from around the wicket, it is always likely to be pitching outside leg.

This one is no different.

England might be toiling but there are a couple of balls in Leach's over that show just how quickly this could all change.

The first of them is a touch short but beats Williamson as he went back to cut. It stayed low to go under the bat but so nearly found the edge.

Very next ball, there is some turn and a leading edge from Williamson spins away past short third for two. Again, it could have ended very differently.

As well as the leg slip, there is a ring of four fielders, including three in a line from square leg to mid-wicket, in catching and perhaps for the first time, they look in the game as Anderson bowls to Blundell.

A couple drop just short of them before Blundell overbalances as the ball slides down leg and thumps off Foakes' gloves and away for a bye.

David Gower
Ex-England captain on BT Sport

Ollie Robinson has misread that. He went to his right, initially. It's a rare error from Tom Blundell. Most of New Zealand's attacking strokeplay has been controlled aggression.

Cries of "caaatch!" as Blundell advances to Leach and slices the ball down towards long off.

Ollie Robinson is the fielder down there but he doesn't pick it up, moves back initially rather than coming towards the ball and that likely costs him the chance of a catch.

It has been that sort of session for England so far.

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Only a couple of singles from Anderson's over, both clipped leg side as you might expect given his angle of attack and the field placings.

Williamson and Blundell both look ominously comfortable though.