Horsham look to respond to going behind, but are caught by a quick Tykes counter which ends with Callum Styles seeing an effort blocked.
Then Max Watters goes close to a second, glancing a header across the face of Lewis Carey's goal.
It could be a busy evening for the Hornets stopper.
GOAL: Sheppey 1-0 Walsall
James Bessey-Saldanha (21 mins)
PA MediaCopyright: PA Media
Screamer!
It looks promising when Sheppey win the ball just outside Walsall's penalty area, but none of the fans celebrating now could realistically have anticipated what happens next.
James Bessey-Saldanha cuts inside from the left and lashes a glorious, dipping strike towards the near post.
Owen Evans is at full stretch but the venomous speed of the shot means it evades his reach.
An upset is on!
Post update
Sheppey United 0-0 Walsall
Good save!
Liam Gordon fires in a low shot from a tight angle inside the penalty area. Aiden Prall is equal to it, and Connor Wilkins hacks the rebound from the goalkeeper's save clear.
Walsall's speed of play is making the different at the moment. They've had almost 70% of possession.
GOAL: Barnsley 1-0 Horsham
Max Watters (14 mins)
Getty ImagesCopyright: Getty Images
That's the early breakthrough they wanted.
Horsham goalkeeper Lewis Carey made a fine save to tip over John McAtee's stinging drive.
But he's left helpless as Max Watters powers a header home from the resulting corner, Super delivery from Jamie McCart.
Post update
Sheppey United 0-0 Walsall
Frankie Morgan relieves the pressure on Sheppey by scampering down the left and winning a corner.
Walsall clear, allowing Douglas James-Taylor to try to break. His crossfield pass isn't accurate, but the familiar pattern of the Saddlers playing inside their opponents' half resumes.
Post update
Sheppey United 0-0 Walsall
Oisin McEntee shows tenacity to break onto a long ball inside the penalty area and stab a pass back into the path of Douglas James-Taylor in front of goal.
The forward is under pressure but manages to wedge in a shot. It's straight at goalkeeper Aiden Prall, who gathers at the second time of asking.
Walsall have had all five attempts so far. They'll be pleased with how they've started.
Post update
Barnsley 0-0 Horsham
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Horsham were worried that the fixture change would affect their travelling numbers, but those that have made the trip from Sussex are already in full voice.
For the hosts, Callum Styles tries the spectacular with an overhead kick from Owen Dodgson's corner but it's behind for a GK.
John McAtee then tries a shot from the edge of the box but it's rushed and off-target
Post update
Sheppey United 0-0 Walsall
Sheppey manager Ernie Batten is wearing an excellent aviator-style winter hat with ear flaps on the sideline.
Looks like the home boss won't be feeling the cold too much tonight. He's watched Walsall have more of the play in the last few minutes, and home defender Connor Wilkins makes a good block to divert Douglas James-Taylor's effort behind after the forward spins and shoots inside the box.
Post update
Barnsley 0-0 Horsham
We kicked off a few minutes late at Oakwell but already Barnsley are controlling possession, as you may expect.
Horsham are looking to pack midfield and cut down space for the hosts.
Post update
Sheppey United 0-0 Walsall
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Walsall kept the ball inside Sheppey's half for much of the opening two minutes of this games, but there was then a roar of anticipation from the home fans as Danny Leonard raced on to a ball down the right.
The hosts win a corner. Goalkeeper Owen Evans claims the delivery, ending a promising spell of pressure for United.
KICK-OFF
#bbcfacup
And we're off!
Will it be smooth sailing for the EFL teams, or will the cup sprinkle a little of its magic and provide us with an upset?
Let's find out.
Team news - five changes for Sheppey
Sheppey United v Walsall (19:45 BST)
Sheppey bring in five players following their 3-2 defeat at Merstham on Saturday.
Connor Wilkins, Danny Leonard, Danny Bradshaw, James Bessey-Saldanha and Jacob Lambert all start.
It's the same starting side who took them through to this round by beating Billericay.
There are two changes for Walsall from the side who started their 2-1 defeat at Mansfield in League Two on Saturday.
Irish defender Oisin McEntee and 21-year-old forward Douglas James-Taylor, who made his EFL debut while on loan from Stoke City at the start of last season, come in.
Barnsley make five changes from the starting side in their 2-2 draw at home to Fleetwood Town in League One on Saturday.
Corey O'Keeffe, who scored the 88th-equaliser to earn them a point, comes in alongside Callum Styles, Owen Dodgson and Max Watters.
Fabio Jalo, 17, is also promoted from the bench. The forward has been capped by Portugal at under-18 level and spent five years of his youth career at Benfica.
Let's take a look at the key stats from Opta for Barnsley v Horsham...
This is the first meeting between these teams in the FA Cup proper and the Tykes’ first tie
with a non-league team since losing 1-0 to Altrincham in November 2015.
Horsham are in the FA Cup first round for the second time in the last three seasons, going out against Carlisle in the first round in 2021-22. They have only reached the second round once, knocking out Maidenhead United in the first round in 2007-08.
Barnsley have won five of their last six home matches in the competition, their only defeat during that run
coming against Chelsea in February 2021, when Thomas Tuchel had a taste of Oakwell.
Look away from this one, Horsham fans: you've lost all three of your away games in the FA Cup proper, shipping 17 goals in the process: a 9-1 hammering by Notts County in 1947, 6-2 loss at Swansea in 2007 and 2-0 defeat at Carlisle in 2021. Time to make history?
'Sheppey is a progressing club'
Sheppey United v Walsall (19:45 GMT)
Sheppey have an in-form striker in feared non-league marksman Danny Bradshaw, who re-joined the Ites in June and took the number nine shirt, having previously scored 126 goals in 150 appearances for them.
"It was always a hard decision to leave the Ites in the first place and I had every intention of coming back at some point," Bradshaw said when he returned.
"The supporters are great and as this is where I live too, I’ve always had a close connection to the club.
“Sheppey is a progressing club, both on and off the pitch. The facilities just get better and better each year, with the pitch being one of the best you will play on."
The prolific poacher, who scored a goal in each of Sheppey's meetings with Billericay on their way to reaching this round on penalties, is also the younger brother of former Saddlers striker Tom Bradshaw, who's currently at Millwall.
The elder footballing Bradshaw has scored more than 100 career goals, averaging almost one every other game at Walsall between 2014 and 2016 to earn bigger moves - first to Barnsley, then to the Lions.
Good omens for Walsall?
Sheppey United v Walsall (19:45 BST)
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Sheppey United’s first ever match in the FA Cup proper is their first competitive meeting with
Walsall, who have won their last two games in the competition against non-league sides. Both of those games were away and finished 1-0.
The Saddlers are on a run of four FA Cup away wins, which is their best ever sequence on the road in the competition proper.
The only time they haven't reached the second round in the last five campaigns was in 2020-21, but they made up for that with their best run for eight years last time around, including a 2-1 win at Stockport County in the third round which defender Liam Gordon justifiably enjoyed (above).
They then went out in the fourth round with a 1-0 defeat at home to Leicester City.
Good evening...
#bbcfacup
PA MediaCopyright: PA Media
...and welcome to tonight's live FA Cup first round coverage, in which the first step beyond qualifying on the road to Wembley features tantalising encounters for two non-league clubs against EFL teams.
Walsall - 15th in League Two - travel to Sheppey, who play four divisions below them in the Isthmian League South-East Division and have an artificial pitch.
Sheppey - the lowest ranked team in the competition - knocked out Isthmian Premier League club Billericay Town in the previous round to get to this point, but one of the teams in their victims' division, Horsham, went through to set up a meeting with League One side Barnsley tonight.
Horsham are seventh in their division, while their hosts are fifth in the third tier after going five games unbeaten including three wins along the way in which they kept a clean sheet.
We'll bring you build-up, live updates, reaction and more on what promises to be an enjoyable start to the weekend's cup action.
Live Reporting
Ben Miller and Chris Harby
All times stated are UK
Post update
Barnsley 1-0 Horsham
Barnsley are not messing about here.
Horsham look to respond to going behind, but are caught by a quick Tykes counter which ends with Callum Styles seeing an effort blocked.
Then Max Watters goes close to a second, glancing a header across the face of Lewis Carey's goal.
It could be a busy evening for the Hornets stopper.
GOAL: Sheppey 1-0 Walsall
James Bessey-Saldanha (21 mins)
Screamer!
It looks promising when Sheppey win the ball just outside Walsall's penalty area, but none of the fans celebrating now could realistically have anticipated what happens next.
James Bessey-Saldanha cuts inside from the left and lashes a glorious, dipping strike towards the near post.
Owen Evans is at full stretch but the venomous speed of the shot means it evades his reach.
An upset is on!
Post update
Sheppey United 0-0 Walsall
Good save!
Liam Gordon fires in a low shot from a tight angle inside the penalty area. Aiden Prall is equal to it, and Connor Wilkins hacks the rebound from the goalkeeper's save clear.
Walsall's speed of play is making the different at the moment. They've had almost 70% of possession.
GOAL: Barnsley 1-0 Horsham
Max Watters (14 mins)
That's the early breakthrough they wanted.
Horsham goalkeeper Lewis Carey made a fine save to tip over John McAtee's stinging drive.
But he's left helpless as Max Watters powers a header home from the resulting corner, Super delivery from Jamie McCart.
Post update
Sheppey United 0-0 Walsall
Frankie Morgan relieves the pressure on Sheppey by scampering down the left and winning a corner.
Walsall clear, allowing Douglas James-Taylor to try to break. His crossfield pass isn't accurate, but the familiar pattern of the Saddlers playing inside their opponents' half resumes.
Post update
Sheppey United 0-0 Walsall
Oisin McEntee shows tenacity to break onto a long ball inside the penalty area and stab a pass back into the path of Douglas James-Taylor in front of goal.
The forward is under pressure but manages to wedge in a shot. It's straight at goalkeeper Aiden Prall, who gathers at the second time of asking.
Walsall have had all five attempts so far. They'll be pleased with how they've started.
Post update
Barnsley 0-0 Horsham
Horsham were worried that the fixture change would affect their travelling numbers, but those that have made the trip from Sussex are already in full voice.
For the hosts, Callum Styles tries the spectacular with an overhead kick from Owen Dodgson's corner but it's behind for a GK.
John McAtee then tries a shot from the edge of the box but it's rushed and off-target
Post update
Sheppey United 0-0 Walsall
Sheppey manager Ernie Batten is wearing an excellent aviator-style winter hat with ear flaps on the sideline.
Looks like the home boss won't be feeling the cold too much tonight. He's watched Walsall have more of the play in the last few minutes, and home defender Connor Wilkins makes a good block to divert Douglas James-Taylor's effort behind after the forward spins and shoots inside the box.
Post update
Barnsley 0-0 Horsham
We kicked off a few minutes late at Oakwell but already Barnsley are controlling possession, as you may expect.
Horsham are looking to pack midfield and cut down space for the hosts.
Post update
Sheppey United 0-0 Walsall
Walsall kept the ball inside Sheppey's half for much of the opening two minutes of this games, but there was then a roar of anticipation from the home fans as Danny Leonard raced on to a ball down the right.
The hosts win a corner. Goalkeeper Owen Evans claims the delivery, ending a promising spell of pressure for United.
KICK-OFF
#bbcfacup
And we're off!
Will it be smooth sailing for the EFL teams, or will the cup sprinkle a little of its magic and provide us with an upset?
Let's find out.
Team news - five changes for Sheppey
Sheppey United v Walsall (19:45 BST)
Sheppey bring in five players following their 3-2 defeat at Merstham on Saturday.
Connor Wilkins, Danny Leonard, Danny Bradshaw, James Bessey-Saldanha and Jacob Lambert all start.
It's the same starting side who took them through to this round by beating Billericay.
Starting XI: Prall, Morgan, Majoyegbe, Hamill, Leonard, Wilkins, Bradshaw, Bessey-Saldanha, Lambert, Diallo, Wisson.
Subs: Birch, Graham, Housego, Glock, Willis, Marsh, Morris, Durowoju, Spencer.
There are two changes for Walsall from the side who started their 2-1 defeat at Mansfield in League Two on Saturday.
Irish defender Oisin McEntee and 21-year-old forward Douglas James-Taylor, who made his EFL debut while on loan from Stoke City at the start of last season, come in.
Starting XI: Evans, Okagbue, Gordon, McEntee, Daniels, Riley, Hutchinson, Knowles, James-Taylor, Stirk, Tierney.
Subs: Smith, Matt, Foulkes, Comley, Allen, Menayese, Thomas, Johnson, Griffiths.
Team news - Tykes change five, Horsham four
Barnsley v Horsham (19:45 BST)
Barnsley make five changes from the starting side in their 2-2 draw at home to Fleetwood Town in League One on Saturday.
Corey O'Keeffe, who scored the 88th-equaliser to earn them a point, comes in alongside Callum Styles, Owen Dodgson and Max Watters.
Fabio Jalo, 17, is also promoted from the bench. The forward has been capped by Portugal at under-18 level and spent five years of his youth career at Benfica.
Starting XI: Kilip, Williams, De Gevigney, Kane, Jalo, Styles, O'Keeffe, McCart, Dodgson, Watters, McAtee.
Subs: Flavell, Shepherd, McCarthy, Cadden, Cotter, Phillips, Connell, Benson, Cole.
Horsham switch four players from their 2-1 win at Larkhall Athletic in the FA Trophy first round on Saturday.
Shamir Fenelon, Daniel Ajakaiye, Bobby Price and James Hammond are the new faces in the starting line-up.
Defender Jack Strange, who was part of Queens Park Rangers' youth academy, was their hero against the Bath side, scoring both of their goals.
Starting XI: Carey, Price, Sparks, Hester-Cook, Strange, Barker, Ajakaiye, Fenelon, Brivio, Hammond, Harding.
Subs: Lelliott, Rodrigues, Kavanagh-Richards, Tuck, El-Abd, Meekums, Daniel, Harris.
Stat attack - Horsham have been here before
Barnsley v Horsham (19:45 BST)
Let's take a look at the key stats from Opta for Barnsley v Horsham...
'Sheppey is a progressing club'
Sheppey United v Walsall (19:45 GMT)
Sheppey have an in-form striker in feared non-league marksman Danny Bradshaw, who re-joined the Ites in June and took the number nine shirt, having previously scored 126 goals in 150 appearances for them.
"It was always a hard decision to leave the Ites in the first place and I had every intention of coming back at some point," Bradshaw said when he returned.
"The supporters are great and as this is where I live too, I’ve always had a close connection to the club.
“Sheppey is a progressing club, both on and off the pitch. The facilities just get better and better each year, with the pitch being one of the best you will play on."
The prolific poacher, who scored a goal in each of Sheppey's meetings with Billericay on their way to reaching this round on penalties, is also the younger brother of former Saddlers striker Tom Bradshaw, who's currently at Millwall.
The elder footballing Bradshaw has scored more than 100 career goals, averaging almost one every other game at Walsall between 2014 and 2016 to earn bigger moves - first to Barnsley, then to the Lions.
Good omens for Walsall?
Sheppey United v Walsall (19:45 BST)
Sheppey United’s first ever match in the FA Cup proper is their first competitive meeting with Walsall, who have won their last two games in the competition against non-league sides. Both of those games were away and finished 1-0.
The Saddlers are on a run of four FA Cup away wins, which is their best ever sequence on the road in the competition proper.
The only time they haven't reached the second round in the last five campaigns was in 2020-21, but they made up for that with their best run for eight years last time around, including a 2-1 win at Stockport County in the third round which defender Liam Gordon justifiably enjoyed (above).
They then went out in the fourth round with a 1-0 defeat at home to Leicester City.
Good evening...
#bbcfacup
...and welcome to tonight's live FA Cup first round coverage, in which the first step beyond qualifying on the road to Wembley features tantalising encounters for two non-league clubs against EFL teams.
Walsall - 15th in League Two - travel to Sheppey, who play four divisions below them in the Isthmian League South-East Division and have an artificial pitch.
Sense an upset? Saddlers boss Mat Sadler is determined to ensure it doesn't happen - and you can read all about how he's been scouting Sheppey.
Sheppey - the lowest ranked team in the competition - knocked out Isthmian Premier League club Billericay Town in the previous round to get to this point, but one of the teams in their victims' division, Horsham, went through to set up a meeting with League One side Barnsley tonight.
Horsham are seventh in their division, while their hosts are fifth in the third tier after going five games unbeaten including three wins along the way in which they kept a clean sheet.
We'll bring you build-up, live updates, reaction and more on what promises to be an enjoyable start to the weekend's cup action.