A good sound win for Bristol City, who will be away at Sheffield United or Plymouth in round five.

It is Barnsley's afternoon. Callum Style's neat turn and finish sees off Championship leaders Norwich. The Tykes march on in to round five, where Chelsea or Luton are the opponent.

Two minutes left for Forest to suffer.

Michael Brown
Former Sheffield United midfielder on BBC Radio 5 Live

The last 15 minutes have been really uncomfortable, and with the games coming up United didn't need this ending.

Time is almost up at Oakwell. I think it is Barnsley's afternoon.

Oh, there was a chance for Donny to at least take something away with them. A ball is chipped over the top for Fejiri Okenabirhie to run on to. He carries the ball into the box but with just young keeper Trott to beat he blazes his effort way over the bar.

Plymouth have a free-kick, send everyone up!

United flick it on, it comes to Byron Moore but it's a tight angle and he can only skid a shot over the bar.

FOUR minutes added on.

It is looking like Blackpool's FA Cup run is going to come to an end. The last few minutes have been all Brighton, but then Blackpool did equalise from nothing just before half time...

Heading towards injury time at Oakwell. Norwich in last chance saloon. It's all hopeful punts forward, though.

The board goes up... three minutes to go.

Six goals in this game now. This from Matt Grimes in the first half is still the best of the lot.

Any more to come?

Check out the backflip...

Into the final five minutes. Plymouth have given this a good go but United are looking to just manage this home.

Rare chance for Forest but Miguel Guerrero can only head it wide from a far way out in the box.

Liam Cullen is off. He heads straight down the tunnel for treatment, still being supported by medical staff.

Bit of an odd one. Nathan Trott is on to replace Fabianski in goal. No injury, just a chance for the young lad to make his debut.

And another young player gets his first taste of first-team action, as defender Jamal Baptiste comes on for Fredericks.

Michael Brown
Former Sheffield United midfielder on BBC Radio 5 Live

Great spell from Plymouth, they are moving Sheffield United around and forcing them back. They have a little bit of confidence now.

Swansea's Liam Cullen is being helped off by two of the medical staff. He doesn't look in good shape.

Change expected shortly.

Massive chance for Brighton to put this out of reach as Neal Maupay is unmarked as he meets a cross inside the area but he fires straight at Chris Maxwell. Should have done better.

Norwich have seven minutes to save themselves at Oakwell. They've made all five subs - Vrancic and Buendia included - but the home side are holding firm.

Into the final 10 minutes here and it is Brighton who are looking the most likely to score at the moment.

Blackpool have fresh legs on, though, with Oliver Sarkic, Bez Lubala and Sullay Kaikai all on.

Is there to be one more twist in this game?

Image source, Getty Images