Into the final 20 minutes at Brisbane Road and Leyton Orient still hold a slender lead thanks to Jordan Brown's wonder strike earlier in the half.

Can Charlton find an equaliser to remain level on points with the O'?

Nnamdi Ofoborh goes into the referee's book for a bad challenge.

Abraham Odoh is close to adding a third for Posh but his effort is cleared off the line by Morgan Feeney to keep Shrewsbury in it.

Goalkeeper Jamal Blackman needs treatment for an injury.

Mat Sadler makes his first change as Brandon Comley makes way for Charlie Lakin.

It's 10 v 10 now!

Cambridge's James Gibbons hurtles into a challenge and is shown a straight red!

An eventful second half at Broadfield Stadium... can Crawley find a way back into this?

Close to a third for Peterborough but Hector Kyprianou, who got the winner at Huddersfield last weekend, flashes a header wide.

Ross Embleton
Former Swindon Town assistant on BBC Wiltshire

It just felt like Walsall were starting to get a foothold in the game.

It's a great time for Swindon to score.

They really have to keep that intensity in the middle of the pitch now.

Stockport made a triple change at the break and they have made it 1-1 against Blackpool with Benony Andresson getting his first goal for the club.

Barnsley now lead Lincoln 3-0 with George Gent getting the third just after the break.

Rotherham have turned it around to now lead 2-1 at Bristol Rovers thanks to Zak Jules.

A Ryan Sweeney own goal has drawn Mansfield level 1-1 at Burton.

Huddersfield still hold a 2-1 lead at Stevenage, and Dara Costelloe's goal means Northampton are 1-0 up at Exeter.

And the deadlock has been broken in the north west with Jason Kerr's goal putting Wigan 1-0 up on Reading.

Crawley are down to 10 men.

There's a coming together off the ball inside the Cambridge penalty area and Rushian Hepburn-Murphy has been shown a straight red.

It's unclear exactly what happened, but the Red Devils have even more of an uphill battle now with half-an-hour remaining.

Oh my, Kayne Ramsay... he really, really should have brought Charlton level.

A corner comes in from the right and Ramsay connects at the back post from no more than two yards out but somehow heads well over the bar.

Will the Addicks rue that chance?

Crawley have certainly looked a lot more lively in this second half without being able to carve out a clear-cut chance just yet.

But much of the game is being played in the Cambridge defensive third - a vast improvement on the first 45 minutes.

A quieter start to the second period than we had in the first but that's an understatement.

Bradley Ihionvien has flashed a ball across the face of the Shrewsbury goal and struck another effort wide.

Paul Parker
Ex-QPR and Manchester United defender on BBC Radio London

It's not often I can say it but 'wow' what a goal.

You don't see many goals like that in the Premier League because players are afraid to shoot.

Jordan Brown has just stepped on the ball and belted it.

Off we go for the second period and early indications are the dismissal of Shrewsbury skipper John Marquis after 13 seconds is the earliest red card since EFL records began.

I don't think it's a record he'll be bragging about.

Paul Parker
Ex-QPR and Manchester United defender on BBC Radio London

It's already been a good start from Leyton Orient in this half than it was in the first.

Charlie Kelman bursts down the right for Orient and flashes a ball across the face of goal. Another moment of promise for the O's, who have their tails up here.

Leyton Orient are out of the traps the quicker of the two sides. Darren Pratley has an effort blocked before the hosts win a free-kick on the right.

Dilan Markanday fizzes it to the back stick but Charlton's Josh Edwards heads clear.

The O's recycle well but it eventually goes out of play for a goal-kick from Jayden Sweeney's cross.

A good start by Orient in the second period.