Stay tuned for 23 goals via the highlights tab at 17:15 GMT - we'll have action from the following games, with the others to follow:

Blyth 2-3 Birmingham

West Brom 7-0 Gateshead

Tranmere 2-6 Swansea

Preston 2-0 Norwich

Derby 1-0 Southport

Mick: Carver Out!

Andrew: Great result for Rochdale, a really gritty performance. Wembley here they come!

Jamie: Luton Town, Middlesbrough, Oxford United, Swindon Town... all teams to have won something since Newcastle last won a domestic trophy. Of course, us Geordies with our unreasonable expectations dare to think we merit a place in such high company...

Birmingham boss Gary Rowett: "It was a very, very nervy first half. You know what Blyth are going to do and they were absolutely brilliant this afternoon. That is what the FA Cup is all about. You all want to play in it and they ran us very close.

"The key for us is that we had used 13 players over 10 games so we had to give them an opportunity and make changes. Don't forget that all of our players today have played in at least the Championship. That is no excuse to how we started the game.

"We didn't expect to be 2-0 down at half time and we needed to give the fans more. As soon as we got one Blyth's heads went down."

The clock is ticking towards injury-time in the delayed match at The Valley, but it is the visitors who look likeliest to score another. Blackburn midfielder Tom Cairney smashes a vicious left-foot shot against the underside of the home crossbar.

Image source, PA

Performance of the day? The Heed Army followed Gateshead to Premier League West Brom and didn't let a 7-0 pasting get in the way of supporting their side.

They showed an impressive disregard for insulation at the highest ground in the Football League as well.

Former Tottenham manager David Pleat
at Hawthorns for BBC Radio 5 live sports extra

"Gateshead play the right way and know what they want to do. They lost their heart a little after conceding the third goal, but the home supporters are warmly applauding the visiting team off the pitch. They know that West Brom were no way seven goals better than their opponents, but the Baggies' finishing was ruthless either side of half time.

"You would not have believed this scoreline early on as Gateshead attacked with such verve and tenacity, but football is a funny old game and you have to take your chances."

Blyth captain Robbie Dale: "At 2-0 up we got carried away. Once they came out and got one their tails were up and they showed their class.

"We had a perfect first-half but Birmingham were so quick to get three. It was a brilliant atmosphere today, both sets of fans were top class.

"We thought we would be hanging on all game so to be 2-0 up at the break was amazing. We've had a great cup run."

The Blyth players and staff are embarking on a lap of, if not quite honour, then appreciation. Plenty of back slapping, handshakes and hugs for the men from the seventh tier. What an effort. They dared to dream, but all credit to Birmingham for a cracking comeback.

Image source, PA

Game, set and match for Boro. The Championship side, down to 10 men after Adam Clayton saw red moments ago, edge closer to the fourth-round draw as defender Daniel Ayala nods in Grant Leadbitter's corner.

Rochdale are in the hat for the fourth round. Lisa Stansfield will be happy.

The Southport players collapse to the ground through a mixture of sadness, frustration and exhaustion. Away keeper David Raya Martin, who defied Derby for so long, is close to tears as he tries to hide his emotions under his sweaty shirt. The Derby fans, along with the 2,700 away supporters, stay behind to clap the Conference side back down the tunnel.

Nathan Orr: Despite defeat, @Blyth_Spartans should be very proud of their achievements. They've done a little seaside town very proud.

Alex Roll: 7-0, 6-2, 5-1 sounds like a tennis score but no, that's the magic of the FA Cup & that's why I love it!

Lewis Coombes: That injury time penalty for #dcfc against non-league #Southport is about as romantic as a wet mackerel round the chops

30 seconds to go. Rochdale is preparing to party.

Forest turning the screw and Josh Lillis makes a fingertip save to keep Rochdale ahead.

BBC Radio 5 live

Southport forward Richard Brodie: "It is heartbreaking for everything we have done today and over the last four rounds. To get to 92 minutes and then concede a penalty is disappointing. I'm close to tears."

Rochdale have got three minutes left to hang on...