Late deals: Slimani to Newcastle, Sorloth to Palace, Hugill to West Ham, Andy King to Swansea
Riyad Mahrez staying at Leicester despite Man City interest
Swansea sign Andre Ayew from West Ham for cub-record £18m
Stoke sign Badou Ndiaye for £14m
Arsenal sign Pierre-Emerick Aubameyang for £56m
Olivier Giroud joins Chelsea from Gunners; Spurs sign Moura
Dortmund sign Chelsea's Michy Batshuayi on loan
Your club's January window in gifs - use #bbcdeadlineday
Transfer window shuts at 23:00 GMT in England, midnight in Scotland
One BIG move that looked like happening, but now looks like NOT happening, was winger Riyad Mahrez leaving Leicester for Manchester City.
City pulled out of the deal earlier on today but Mahrez is not in the squad to play Everton tonight.
Could a move still happen?
A big(ish) signing in the Championship - Derby County striker Chris Martin has agreed to join Reading on loan until the end of the season.
The Scotland international, 29, last started a game for his parent club on 9 December in the Championship victory against Barnsley.
Former Norwich player Martin scored 11 goals on loan at Fulham last season, including a double against Reading.
He also came off the bench to score against the Royals earlier this season in a 4-2 defeat at Pride Park.
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Luke, Slough: Just telling my un-interested wife about Arsenal buying Pierre-Emerick Aubameyang for £56m. Her reply? "wow that’s a lot for 2 players"...
Image source, Getty ImagesLookman heads east
Everton
Big Sam signed Theo Walcott this month and maybe he's got one winger too many. Either way, this seems a slightly odd move as Ademola Lookman heads to the Bundesliga and joins RB Leipzig on loan!
Image source, BBC Sport#bbcdeadlineday or 81111 on text
Bradley Hewitt: Deadline day and I'm doing my best impression of Peter Odemwingie by sitting in my car in a car park and waiting patiently for that important call. Unfortunately mine is because I have a flat tyre and I'm waiting on someone to come out and sort it for me.
Hopefully you have a little more luck than he did...
Just in from work? Missed anything?
Here's a full list of all of today's Premier League transfers - including the aforementioned gorgeous Giroud...
Premier League
18:30 Lucas Moura [Paris St-Germain - Tottenham] About £25m
17:47 Didier Ndong [Sunderland - Watford] Loan
16:47 Olivier Giroud [Arsenal - Chelsea] £18m
11:13 Pierre-Emerick Aubameyang [Borussia Dortmund - Arsenal] £56m
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James Young: Excited about Chelsea's business this window. I've had a man-crush on Giroud for some time (from a footballing perspective, of course). He will certainly provide more stiff competition for Morata.
Image source, Rex FeaturesYes! A proper deadline day stalwart. The former Manchester United man has got himself a new club. Which is quite some effort.
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Leagues One & Two
Plenty of movers in Leagues One and Two as teams fight for promotion and relegation.
Here's some of the bigger moves you may have missed.
Image source, Getty ImagesNathan Thomas [Sheffield United - Shrewsbury] Loan
Moses Makasi [West Ham - Plymouth] Loan
Jake Andrews [Bristol City - Cheltenham] Loan
Louis Dodds [Shrewsbury - Chesterfield] Free
Eoin Doyle [Preston - Oldham] Loan
Jacob Davenport [Manchester City - Burton] Loan
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'We'll be singing, when we're winning, we'll be singing...'
This is all for you Arsenal fans.
On complicated new Arsenal songs. To the tune of Witch Doctor by the Cartoons: 'Ooh Eeh Ooh Aah Aah Ting Tang Aubameyanga bang bang'.
Alex from London
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West Ham remain in talks with Preston striker Jordan Hugill - is he the man to fill Andy Carroll's boots?
That's one of the moves still bubbling away. Add Mangala, Mahrez, Ayew, Slimani, King and Powell to your list of maybe movers...
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Bit harsh?
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Southampton
When the early sale of Virgil van Dijk went through, fans initially took comfort in the fact that we’d have £75m to correct and amend the blatant issues within the squad. Yet here we are just hours away from the window closing with a team that’s arguably weaker than before.
Not only did we decide to sell our best centre-back and show no intention of replacing him, but our pursuit of Quincy Promes - which appeared to start only a matter of days ago - has fallen flat on its face, with Spartak fearful that they won’t find a replacement in time. Who’d have thought on 31 January?
The addition of Guido Carrillo is certainly welcome given that he appears to suit Pellegrino’s more physical demands of a centre forward, but I’ve once again been left in disbelief that 18 months on from Sadio Mane’s departure, we’re yet to recruit another player of his profile.
Aidan Small - writer for FreshSaints and Daily Mail
You don't get many new chants to Wham! tunes these days.
Mind you, Earth, Wind & Fire have conquered the market in the last few months...
Phil McNulty
BBC Sport chief football writer
Liverpool's Lazar Markovic may still make a loan move away from Anfield before tonight's transfer deadline - but a proposed switch to Swansea City looks to be off.
The 23-year-old Serbian, a £20m signing by then manager Brendan Rodgers from Benfica in summer 2014, is currently at Liverpool's Melwood training headquarters awaiting developments after both Swansea and Wolfsburg held talks over a move.
Markovic has no future at Anfield under manager Jurgen Klopp and has failed to feature this season.
A transfer to a European club now looks to be his best option after Swansea's interest cooled.
Russian side Lokomotiv Moscow have also been linked with a player who has had loan spells at Fenerbahce, Sporting Lisbon and Hull City in recent seasons since falling from favour at Liverpool.
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Dan: (Mr Tambourine Man) Hey! Pierre-Emerick Aubameyang, score a goal for me I'm not sleepy and there is no place I'm going to. Hey! Pierre-Emerick Aubameyang, score a goal for me In the jingle jangle morning I'll come following you
Gavin: (to the tune of 'Wham Rap!) "Aubameyang, he is our man. Batman or not, he can't be stopped"
Collin: In relation to the problem with writing chants for Aubameyang - surely there’s something that can be worked on around Skrillex’s “Bangarang”...?
Image source, Getty ImagesPhil McNulty
BBC Sport chief football writer
Liverpool's Lazar Markovic may still make a loan move away from Anfield before tonight's transfer deadline - but a proposed switch to Swansea City looks to be off.
The 23-year-old Serbian, a £20m signing by then manager Brendan Rodgers from Benfica in summer 2014, is currently at Liverpool's Melwood training headquarters awaiting developments after both Swansea and Wolfsburg held talks over a move.
Markovic has no future at Anfield under manager Jurgen Klopp and has failed to feature this season.
A transfer to a European club now looks to be his best option after Swansea's interest cooled.
Russian side Lokomotiv Moscow have also been linked with a player who has had loan spells at Fenerbahce, Sporting Lisbon and Hull City in recent seasons since falling from favour at Liverpool.
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Image source, Lee ColverPoor Mahrez, all alone and confused...
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To the tune of Agadoo. "Aubameyang-yang-yang darts past one so easily. Aubameyang-yang-yang brings defenders to their knees. To the left, to the right come along and sing with me, Aubameyang-yang-yang and the Arsenal football teeeeam.
James
Excellent work, James
Burnley were reportedly interested, but BBC Radio Nottingham are telling us that defender Joe Worrall will not be leaving Nottingham Forest.