That's Cook's 32nd Test half century and I suspect one of the hardest most battling he's ever scored. But a really important one given his form this series
Lyon has his man! That's revenge for you. He gets KP caught behind - KP doesn't even wait for the finger.
Fair play to Lyon - he came back from KP's early attack on him with determination and has bowled really well. But then he mostly did at OT without reward.
Oh dear - England were going along nicely and now Cook has misjudged on from Bird and is hit in front of leg stump. They're gonna need Ian Bell to rescue them again
It was a corking delivery from Bird though - an inswinger that foxed Cook
England are yet again relying on Bell. OK so it's not 30/3 like they have been but it's a worrying decline from how things were in 2010/11 and the summer of 2011
Afternoon session summary
England resumed after lunch 56/1. It continued to be slow and steady but with some signs of aggression from Trott and Cook. Trott in particular looking much more back to his old self playing neatly off his hips and through the on side. They brought up the 50 partnership in the 35th over off 101 balls increasing the run rate steadily as their confidence increased and the bowlers began to tire.
Out of the blue he nurdled one to Khawaja off Lyon and was out for 49. Pietersen got off the mark with a dance down the track first ball and went on the attack against Lyon, so much so that he was taken out of the attack. Cook battled his way to his 32nd Test match half century - a really difficult one but a really important one for him. Pietersen, on the other hand, was scoring at almost a run a ball until Lyon came back into the attack and got a thick outside edge to Haddin to dismiss KP for 26.
Cook was dismissed LBW just before tea to a beautiful inswinger from Jackson Bird and England go to tea 155/4 with two new batsmen at the crease.
We are back from Tea and uh oh ..............
That was a very soft dismissal - Bell just chipped it up to Harris.
Nathan Lyon has been the surprise package - no one really expected the wicket to turn on day 1 but he's stayed focused even after KP attacked him.
It looks like Bairstow and Prior have decided that counter-attack is the way forward. Bairstow looking very positive against Bird
They are being a bit more watchful against Lyon because he's being bowling really well. Disciplined but getting a nice bit of turn and drift.
Change of bowling. Ryan Harris coming on for his 12th over.
And Prior plays a lovely aggressive drive through the covers. This is the sort of situation that Prior usually likes - one where his natural aggression is the best course of action
Some fantastic fielding from Warner there - he's so quick and athletic. Will save you 20 in the field
A tricky period now for Bairstow and Prior - Harris is bowling very well and they can't take any risks so it's gone a bit lull-ish again.
Ah - on comes Peter Siddle who has been criminally underbowled today
Tight stuff from Siddle as well now. Tough times for England who've made a bit of a hash of today
Billy the bugler is playing Phantom of the opera as Watson bowls
It is very very very slow going. Are you still awake?
IS ANYONE STILL AWAKE?
The ball is 73 overs old and this is becoming slightly painful to watch them try and get it away
Ironic cheers from the crowd as England get a single
34 runs in nearly 20 overs. England are bogged down.
Maybe the new ball will liven things up? Because much as I worship and adore Test cricket this is absolutely painful
Huge shout for LBW against Prior - Siddle came in very wide of the crease and it looks like it is going down leg side.
It's given not out and THEY ARE REVIEWING