Don't forget - 120 places between the two sides at Croft Park. Blyth do look very tired all of a sudden, the pudding of a pitch taking its toll perhaps...

West Brom are now working a groove into the driving seat.

Saido Berahino completes his hat-trick with a confident first-time finish into the bottom corner from Chris Baird's cut-back.

Image source, Getty Images

The visitors have started the second half well, with Lee Evans drilling a shot at the keeper and Bakary Sako firing wide from a corner.

Former Newcastle and England winger Chris Waddle
at Croft Park for 5 live Sport

"To be fair I thought Lee Novak's chance had gone, but nobody closed him down quick enough and the keeper was unsighted from his shot. It nestled a couple of yards inside the post. Blyth, worryingly, have dropped off the pace..."

Leicester are making the early running in the second half at the King Power.

Paul Konchesky sees a volleyed effort deflected wide from distance. Another corner...

Game on! Former Gateshead forward Lee Novak drags Birmingham back into the tie. He picks the ball up out on the left, cuts inside the penalty area and really gets hold of his low shot, a real stinging drive into the corner. His first goal in 18 games.

Image source, Getty Images

You can watch all the goals from this game via the highlights tab in this page at 17:15 GMT.

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

"Saido Berahino curved home his effort beautifully. he was given too much time and his created an angle for himself. A superb effort, but the Gateshead defence was too passive and retreated from him. Tony Pulis claps on the touchline, and we can fairly confidently say now this is game over.

"But there's no way Gateshead deserve to be 3-0 down in this match, with all three goals coming in the last seven minutes of this match."

Birmingham midfielder Mark Duffy has a chance as he breaks into the area but Blyth keeper Peter Jeffries does superbly to stand up and make the block.

BBC Final Score

Steve Claridge: "They should be 3-0 up Blyth, not 2-0 up as they had a great opportunity just before half time."

John Hartson: "Birmingham have got nothing to lose here now, so they've just got to go for it and play football. Could be a dangerous half for Blyth, but they've got to keep their concentration up."

It's been a stroll in the Prenton Park for Swansea this afternoon, who pounce when Tranmere give the ball away and Mo Barrow crosses for Tom Carroll who takes one touch past the defender then buries his side's second of the afternoon from 12 yards out.

Image source, Reuters

The half-time whistles at the delayed ties at Oakwell and The Valley have just been peeped. League One side Barnsley are holding their own as it remains goalless against Championship high-flyers Middlesbrough, while Chris Taylor's early strike gives Blackburn a 1-0 advantage at Charlton.

A lovely strike from Saido Berahino and that is surely good night for Gateshead's FA Cup run.

The sought-after striker fixes a defender and curls a superb shot inside the far post from 20 yards to put the Baggies over the hill and out of sight.

Not much of a celebration from Berahino...

Image source, Getty Images

Former Newcastle and England winger Chris Waddle
at Croft Park for 5 live Sport

"Can Blyth keep up their tempo? Surely Birmingham can't be any worse than they were the the first half, because they were terrible."

We are back under way at the majority of our 17 FA Cup games.

A full moon is out above Croft Park. Figo and a full moon.

Image source, @LuisFigo

The tremors in Blyth have reached the Twitter antenna of Luis Figo.

The former Ballon D'Or winner has decided, at least for a while, he wants updates from the self-proclaimed "most famous non-league football side in the world".

And Caroline Wozniacki.

Robbie Dale could be about to have a 'Ronnie Radford' afternoon.

One moment, one match, can make a life if it comes in the FA Cup. Dale's brace has put his side on the brink of the fourth-round - read Radford on his own FA Cup magic moment here.

Simon Brotherton
Match of the Day commentator at Hawthorns

"Not sure how West Brom are 2-0 up here. Gateshead the better team in the first half.

"Tony Pulis came down to the touch line after only 15 minutes."

While the vast majority of players are back in the dressing room nursing a hot cup of tea, two games are yet to reach half-time.

Barnsley and Middlesbrough, whose kick-off was delayed by a structural problem in one of the Oakwell stands, are still goalless. And Blackburn lead 1-0 at Championship rivals Charlton, with their game 12 minutes behind schedule after floodlight failure at the Valley.

As a part-time barman, Robbie Dale is used to serving up doubles, and his two first-half goals have left Birmingham legless.

Can they sober up and find a way back into the game?

Image source, Getty Images

You can watch the goals from Blyth's game via the highlights tab at the top of this page from 17:15 GMT.