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
Isaac Success is leaving Watford after an 'unsuccessful' (pun intended) spell so far.
The forward is returning to La Liga to join Malaga on loan for the rest of the season.
Aubameyang joins Arsenal
Between myself and Matt (and perhaps a search engine), we've translated what Aubameyang has said in German on his Instagram post.
"First of all sorry for everything that happened in the last month. But I wanted to change last summer, it did not work, but now it had to be. Maybe it was not the best way I chose, but everyone knows that Auba is crazy - and yes, I'm a crazy kid, hahahaha!
"I've made mistakes, but never with malice. I will never forget these four and a half years at Borussia Dortmund, because you all gave me the strength for the level I am now. Thanks to the whole BVB family, the fans, the club, the staff and of course my teammates! Your Auba17 !!!"
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David Ornstein
BBC Sport
Hearing whispers (nothing concrete) Arsenal have been exploring possibility of signing David Luiz from Chelsea as part of the Olivier Giroud deal - as per the Daily Star's chief football writer David Woods' reports yesterday - or Roma’s Kostas Manolas.
Would be one or other, no idea if it will happen. Defence a clear concern for Arsenal.
Bong.
Bong.
Bong.
The hours are ticking by.
Here's a list of every deal that's gone through today, in case you're just catching up.
Image source, Getty ImagesHiya.
I can confirm I'm hyped up on Haribo* and ready to rock.
Let's continue, shall we?
*Other sugary treats are available.
Right. That's me done for this deadline day stint.
Sadly I'm lacking the witty goodbye Shamoon Hafez gave earlier but I can tell you Caroline Chapman is here to take my place and is stocked up on sweets to help see you through the night.
Thanks for the gifs you've been sending. I hope you all get everything you wished for tonight.
Image source, Getty ImagesInflated fees? Panic buys and sure-fire flops? The January transfer window has a reputation for producing somewhat unpredictable purchases.
Do: Your homework, drive a hard bargain, make signings feel welcome.
Don't: Be turned by 'sexy' players.
#bbcdeadlineday or text 81111 (UK only)
It's been a whirlwind 24 hours for Arsenal fans...
Sum up your club's transfer window in a gif!
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Image source, Getty ImagesPlenty of done deals ✅ but plenty of ❓still to be answered. It's going to be fun.
David Ornstein
BBC Sport
Defender Reece Oxford is in Germany to finalise his return to Borussia Monchengladbach from West Ham on loan until the end of the season. No option to buy.
#bbcdeadlineday or text 81111 (UK only)
Joseph Venable: Daniel Sturridge has been the stand-out transfer of the window so far. The second-best striker in the league, gone for a song. Unbelievable.
Drew: I think van Dijk to Liverpool has to be the move of the window so far, in terms of putting a quality player into a slot that really needed filling. Aubameyang is exciting but will the English game be too much for him? Time will tell.
Adam Pope
BBC West Yorkshire Sport
Leeds United goalkeeper Andy Lonergan’s move to Sunderland is OFF. He will rejoin the Leeds squad.... unless anything happens in the window!
#bbcdeadlineday or text 81111 (UK only)
Wolverhampton Wanderers are sitting pretty at the summit of the Championship, but Wolves fan Robert clearly thinks they still need to strengthen.
Thoughts, Wolves fans?
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Me too, Tom. Me too. Don't forget there are seven Premier League games to come tonight as well as an action-packed deadline day.
#bbcdeadlineday or text 81111
Tom Craven: My fantasy team could really do without all this Mahrez stuff.
Latest gossip
Image source, Getty ImagesThere could still be plenty to happen in the Riyad Mahrez saga tonight.
The Mirror, external are now reporting the forward has gone AWOL ahead of Leicester's match against Everton tonight.
Anyone expecting him to turn up at the Etihad, Peter Odemwingie-style?
#bbcdeadlineday or text 81111 (UK only)
They wouldn't, would they?
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David Ornstein
BBC Sport
Swansea have now agreed a deal with West Ham to re-sign striker Andre Ayew for £18m-£20m.
The deal isn't complete yet but it is moving forward.
#bbcdeadlineday
Phil McNulty
BBC Sport chief football writer
Everton midfield man Davy Klaassen's proposed loan move to Serie A giants Napoli is off.
Talks over the deal have broken down and the 24-year-old former Ajax captain, signed in a £24m deal by former Everton manager Ronald Koeman last summer, will now stay at Goodison Park.
Everton, meanwhile, are confident they will complete a loan deal for Manchester City defender Eliaquim Mangala before the transfer window closes.
The whispers seem to be getting just a little bit louder on social media around Michy Batshuayi and Olivier Giroud.
Those deals could be completed very soon.