A nice moment for former Manchester United midfielder Luke Chadwick as he is given a heroic ovation from all four stands as he comes off. On comes Gearoid Morrissey.

A big-up to the one-and-only Springfield Bus and Coach Company, based in Warrington, who came to the rescue of Sam Edwards, external and those stranded Cambridge fans.

@edwardssport:, external Thank you to driver Gaz for the pick-up!

No word yet on whether those supporters are inside Old Trafford...

Into the last 20 minutes at Craven Cottage. Sunderland building up a head of steam but they've not really tested Marcus Bettinelli since his howler in the Fulham goal.

That's another stinker of a cross from Marcos Rojo. Luke Shaw's place is safe at left-back if he keeps that up.

A fast turnaround at Bramall Lane, with Preston coming from a goal down to lead in next to no time. It's centre-back Paul Huntington with his second goal in two games as he heads in Scott Laird's corner. As it stands, we are heading for a fifth-round tie between Preston and Manchester United.

Image source, Getty Images

Marcos Rojo shanks a woeful cross out of play as Manchester United start the second half brightly.

Back under way at Old Trafford. Next goal either kills or revives the game.

Southend United manager Phil Brown
BBC Radio 5 live sports extra

"It was a harmless cross into the box from the left, it took a deflection but it was a dolly of a catch and Marcus Bettinelli has spilled it into his own net. It's a horrendous mistake by the goalkeeper to gift Sunderland a goal. It's a poor, poor mistake."

Sunderland very near indeed to going ahead for the first time as Italian midfielder Emmanuele Giaccherini curls wide from the edge of the box.

The goals are coming thick and fast now, and are we heading for extra-time?

Paul Gallagher does it again. The on-loan Leicester forward scored a stunning free-kick in the first tie at Deepdale 10 days ago, and he's done it again with a pinpoint set-piece into the top corner. Mark Howard has no chance.

Preston could have been level just before that, with Howard making an excellent double save to stop first Scott Laird and then Chris Humphrey. The game at Bramall Lane is most definitely on.

Image source, Getty Images

Oh dear. Oh dear, oh dear. Slapstick goalkeeping from Fulham's Marcus Bettinelli gifts Sunderland an equaliser as he juggles Patrick van Aanholt's speculative cross under little pressure and drops it over the line.

Image source, Getty Images

BBC Sport's Simon Stone at Old Trafford: "Very different emotions in the respective dressing rooms at half-time.

"In the visitors' Tom Elliott will be going over and over in his mind the first-minute chance that could have given the game a sensational start and a memory of a lifetime.

"In the hosts' Paddy McNair should be feeling very pleased with himself.

"The Northern Irishman played a key role in the opening goal by switching play with an astute pass. And, after some early prompting from Wayne Rooney, has become a very useful attacking outlet from his right-back station."

The question for Preston here is: Do they risk bringing on Joe Garner? Their 12-goal top scorer has been out of action for more than two months with a tendon injury, but is on the bench tonight, and may yet be needed. Not much in the way of clear chances so far in the second half, although home keeper Mark Howard has just stopped Tom Clarke's header from a Paul Gallagher cross.

Fulham have a chance to double their lead and again it comes from a deep cross, Alex Kacaniklic heading wide.

Chris Deans: Does it matter what system Van Gaal is using? It's working on the night.

Danny Hacking: What excuses do Man Utd need to make, Steve Claridge? They're 2-0 up.

Bob: Alright Van Gaal, we've got the 2-0 lead with the long ball. Can we start playing properly now?

Get in touch on Twitter using #bbcfacup,, external text us on 81111 (UK only), or leave a message on the BBC Sport Facebook, external or Google+ page., external

A reminder that you can watch the goals from Old Trafford and Craven Cottage via the highlights tab at the top of the page. We'll also have full highlights of both games later.

Former Cambridge forward Steve Claridge on 5 live Sport

"Manchester United have done what they have had to do, no more, no less. It hasn't been particularly fluent, but they are getting the job done. And I remain totally unconvinced by what Louis van Gaal is doing tonight."

Worth tuning into 5 live right now, where a brave Mark Chapman is disagreeing with Steve Claridge's evisceration of Manchester United. Steve isn't taking it too well...

Just like the first half, it's been a frantic opening from Sunderland. Left-back Patrick van Aanholt has the ball at the far post but drags his shot into the side-netting. Big chance.

Cambridge had the chance to score after 51 seconds but now it looks like Manchester United will face Sheffield United in the next round.