Malan shimmies down the pitch and turns a Nathan Lyon delivery past short leg, and away for a single. Bairstow follows suit. It's a definite change of approach from England against the spin, just looking that bit more positive. Shot! Lyon goes full and Malan, legs akimbo, cuts him nicely for four. That brings up the 50 partnership too.

Michael Vaughan
Ex-England captain on BBC Test Match Special

This pair have got to think 'right, we're in now.' They have done the hard yards and now the plan should be to see out the day.

They can't leave it to anyone else. This Australia team have shown that they can go through the tail.

Watchful from Dawid Malan as he stands tall and keeps a series of Cummins deliveries away from his toes. Cummins bangs in a bouncer and Malan sways like he's at a Radiohead gig and stays out of the way. A teasing, wide delivery is ignored by the batsman, before a straight ball is knocked down for an easy single. Meanwhile, Josh Hazlewood is wheeling his arms around to catch his captain's eye.

Nathan Lyon will carry on after tea. There's no turn there for the spinner but he mixes his paces up nicely. Dawid Malan takes a step back in his crease and shapes to crack a loose delivery away, but he can't time the shot properly and ends up bouncing straight to the fielder at backward point. A stroll down the pitch allows him to work a single, and Bairstow prods his way through the rest of the over.

It's so important for Jonny Bairstow and Dawid Malan to kick on here for England. Get their eyes back in, get their feet moving again and see the day out.

Bairstow hoists his bat up towards his shoulders and lets the first few Cummins deliveries shape over his stumps. A sedate maiden to begin the evening session.

Image source, PA

Ta, Tom. Jonny Bairstow makes his way out to the middle, turns around to punch gloves with Dawid Malan and realises he's not behind him. Malan's stopped to fiddle with his gloves and has to jog over to catch up with him.

It'll be Pat Cummins to open up after tea.

Here we go, the players are back out on the field. A big session coming up etc

Here's Amy Lofthouse to guide you home.

Simon Hughes
BBC Test Match Special commentator

Stoneman looks a bit like a rabbit in headlights when they were bowling short. He is very square on and looked vulnerable. He needs to find a way to get off strike. He stuck it out but he didn't look good.

Jon Barbuti: We've been robbed! A batter who was out, being given not out, then correctly given out, but incorrectly given available evidence, (but correctly given subsequent evidence). Just not cricket.

Simon Hughes
BBC Test Match Special commentator

Josh Hazlewood bowled superbly. He sustained his pace and he gets that awkward lift. His figures don't look that impressive - 1-34 - but he has controlled the game for Australia.

Dawid Malan rode his luck at times but has battled his way to 42 from 70 balls.

His Test best is 65 and England will be hoping he can beat that today.

The final session resumes in five minutes.

The pundits are still reviewing and re-chewing the Mark Stoneman dismissal. It was a big moment in the day's play but all that matters is that the third umpire overruled the on-field umpire and gave the England opener out.

He had battled brilliantly for an hour or so. He was dropped twice and smashed in the helmet. It was brutal bowling.

England needed 350 an hour ago. 400 now!

Vic Marks
Ex-England spinner on BBC Test Match Special

I think Australia will be slightly happier. So much hinges on this partnership. What England desperately need is someone in this series to produce a major innings. We've seen a lot of players threaten but there's been no big innings. For England to stay in this Test match, someone has to get a big score. England have to post a total in the 400s.

If you could sum up batting today in one image it would be this:

Image source, Getty Images

Stephan Shemilt
BBC Sport in Perth

Controversy in the broadcast area. The tea-time sausage rolls that were allocated for the BBC have been eaten by an Aussie radio station (we think). Other sausage rolls, meant for the TV stations, are being fiercely guarded. Food politics.

Vic Marks
Ex-England spinner on BBC Test Match Special

Stoneman took a step immediately after the ball got to the keeper and then he had a rethink, which made me think it was out. I couldn't, however, see the evidence that Aleem Dar saw to overturn the decision. My gut says he was out but my rational sense can't see how, in a very quick review, the third umpire found the evidence to contradict the decision. Stoneman didn't look terribly surprised when the umpire changed the decision.

A cracking day's play so far.

There have been boundaries aplenty, a clutch of wickets and even some controversy.

England won the toss but lost Alastair Cook - playing his 150th Test - for seven, worryingly plumb lbw to Mitchell Starc.

James Vince and Joe Root scored freely before falling for 25 and 20 respectively, while Mark Stoneman mixed dashing strokeplay with the odd slice of luck to pass 50.

Stoneman was struck on the helmet by Josh Hazlewood and dropped twice on 52 shortly before he was given out caught behind off the glove, on the basis of some apparently flimsy video evidence.

Since then, Dawid Malan and Jonny Bairstow have calmed matters down with an unbroken stand of 44 to take England to 175-4 at tea.

Image source, EPA