That's all for this evening, folks.

A few deals seem to be rumbling on, but we'll call it a night and update you when they're confirmed.

So, what happened tonight? Well, quite a lot. It was an eventful deadline day to say the least.

Have a click through the list below to recap the night's biggest deals.

• Youssef Chermiti signs four-year deal with Rangers as Cyriel Dessers leaves for Panathinaikos
• Cornelius joins Rangers on season-long loan with option to buy
• Celtic sign winger Tounekti on five-year deal
• Adam Idah completes £6m Swansea move as Celtic work on several targets
• Lydon Dykes to Hibs is OFF
• Aberdeen sign Bologna winger Karlsson on loan
• St Mirren seal deal for striker Nlundulu
• Kevin Nisbet returns to Aberdeen in six-figure deal

• Musa Drammeh leaves Hearts for Portugal
• Celtic defender Stephen Welsh could move to Motherwell
• Livingston sign Man City midfielder on loan

Visit here to get all of the transfer deadline-day moves in one place.

Jesper Karlsson said: “I am really happy to have signed for Aberdeen.

“When I spoke with the manager and staff their desire for me to come here was clear, and that was hugely important to me.

“I believe I can come here and get game time, which I hope will help my efforts to get back into the national team.

“This is a historic club, will big ambition and I look forward to playing at Pittodrie in front of the Red Army.”

Aberdeen manager Jimmy Thelin said: “Jesper is a top professional and to have secured his services is great news for everyone associated with Aberdeen FC.

“He is an extremely talented footballer who has real quality, and we believe he will be a brilliant addition the squad.

“It is important for him to play regularly, and we can provide that opportunity for him to go and perform." t

Image source, Getty Images

That is the definition of a buzzer-beater.

I had a good night entry ready to go.

Aberdeen have signed winger Jesper Karlsson on loan from Serie A side Bologna.

The Swedish international played under manager Jimmy Thelin at Elsfborg.

The club say they have pulled off a "major signing coup".

Want a reminder of all the summer transfer window deals in the SPFL?

Well, we have you covered for all four divisions:

• Who has your Premiership club brought in and let go?
• Championship ins and outs
• League 1 ins and outs
• League 2 ins and outs

I wonder if Bologna club captain Lewis Ferguson told Karlsson that Pittodrie is the right place for him.

Or where the best place for a buttery is, at least...

Hopefully it's confirmed shortly indeed, Tyrone.

It's well past my bedtime.

Tyrone Smith
BBC Sport Scotland

I'm hearing positive noises that the deal to bring Bologna's Swedish winger Jesper Karlsson to Aberdeen has been done.

Hopefully confirmation will be coming shortly.

Dons fans... still scrolling?

Kheredine Idessane
BBC Scotland

Rangers took their summer signing spree to 14 with the late arrivals of striker Youssef Chermiti in a big-money deal and Canada international defender Derek Cornelius on a season-long loan from Marseille with an option to buy.

St Mirren sign a striker in the final few minutes, Dan Nlundulu from Bolton Wanderers.

Falkirk strengthened their backline with the loan signing from Swansea of centre-back Filip Lissah, while Livingston added two bodies on deadline day; midfielder Mahamadou Susoho on loan from Manchester City and a loan deal for young West Ham right-back Junior Robinson.

There are always one or two deals which sneak out the following morning, due to delays with paperwork, or fatigue among the social media teams!

It's been a long day, but with plenty of twists and turns to keep us all interested.

Kheredine Idessane
BBC Scotland

Well, this was certainly one of the more interesting and active Scottish transfer window deadline days.

And it's not quite over yet.

It took them a fair while, but Celtic were finally able to update their social media from farewells to defender Stephen Welsh - to Motherwell on a season-long loan - and striker Adam Idah - a permanent transfer to Swansea City - to rolling out the welcome mat for Tunisian winger Sebastian Tounekti on a five-year deal.

Still no sign of the frontman manager Brendan Rodgers was asking for, although the pressure could be off there if former Leicester frontman Kelechi Iheanacho is now their preferred candidate, as he's a free agent after the mutual ripping up of his contract at Sevilla.

Former Scotland striker Kevin Nisbet - no doubt keen to impress national boss Steve Clarke again - is back at Aberdeen but this time on a permanent deal.

There was the on-off loan deal for Scotland striker Lyndon Dykes, who thought he was joining up with fellow international frontman Kieron Bowie, but the clubs couldn't come to an agreement.

Tyrone Smith
BBC Sport Scotland

Aberdeen fans - watch this space.

The Dons have been pushing to try and get a deal over the line to bring Bologna's Swedish winger Jesper Karlsson - who played under Jimmy Thelin at Elfsborg.

On the face of it, it would be a real coup.

Brian McLauchlin
BBC Sport Scotland

So, disappointment for Hibernian with Lyndon Dykes, but there is one new addition this evening.

Midfielder Dan Barlaser is joining the club from Middlesbrough.

The paperwork is being completed as we speak, and confirmation is expected shortly.

Brian McLauchlin
BBC Sport Scotland

The Lyndon Dykes' deal to Hibs is OFF!

The clubs could not agree to a loan deal, and despite the player being desperate to move, he will remain at Birmingham City at least until January.

Breaking news coming from Leith.

It's not what you wanted to hear, though.

Right, c'mon.

Someone do something.

I've just had a coffee at 23:39, this is silly time all round right enough.

Time for a recap of what we know this transfer deadline day at 2330 BST.

• Youssef Chermiti signs four-year deal with Rangers as Cyriel Dessers leaves for Panathinaikos
• Cornelius joins Rangers on season-long loan with option to buy
• Celtic sign winger Tounekti on five-year deal
• Adam Idah completes £6m Swansea move as Celtic work on several targets
• St Mirren seal deal for striker Nlundulu
• Kevin Nisbet returning to Aberdeen in six-figure deal
• Lyndon Dykes wants to join Hibs - but deal not done

• Musa Drammeh leaves Hearts for Portugal
• Celtic defender Stephen Welsh could move to Motherwell
• Livingston sign Man City midfielder on loan

Visit here to get all of the transfer deadline-day moves in one place.

Brian McLauchlin
BBC Sport Scotland

It’s way past my bedtime but still work ongoing at Easter Road!

Celtic Manager Brendan Rodgers said: “I’m really happy that Sebastian has joined the club and I am sure he will be a really exciting addition to our squad.

“He will give us that real added attacking intent and I am sure he can make a big difference to us.

“He is a quick, clever winger who can operate on both sides, creating opportunities for himself and others.

"Myself and our coaches are really looking forward to working with Sebastian.”

Image source, SNS