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
Watford
BBC Three Counties sports editor Geoff Doyle: "Watford look set to make their third January signing with Sunderland's defensive midfielder Didier Ndong expected to join on loan.
"The deal could become permanent in the summer. Captain Troy Deeney is expected to stay at the club - he's travelled with squad to Stoke for tonight's game - but Stefano Okaka and Isaac Success could be loaned out."
I repeat, WE HAVE A SIGNING. The first one of the day.
Attacking midfielder Matt Penney has completed a loan move from Sheffield Wednesday to Mansfield.
Fantastic stuff and a first opportunity to use my new graphic.
Head here to see all the signings
Image source, BBC Sport#bbcdeadlineday or text 81111 (UK only)
Friendly reminder that Newcastle's transfer record stands at £16m, which they paid to Real Madrid for Michael Owen 12 years ago...
Sum up your club's transfer window in a gif!
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Ian Dennis
Radio 5 live senior football reporter
Goalkeeper Martin Polacek move from Polish club Zaglębie Lubin to Crystal Palace is off. The player was expected to sign today, but the club are now looking at an alternative.
West Ham United
Image source, Getty ImagesHow do you replace this man?
Before the transfer window had even opened, the fans, the board and the manager all knew we needed to bring in reinforcements to bolster our squad - and good ones at that.We've brought in Joao Mario - on loan - from Inter Milan while we've said goodbye to wantaway striker Diafra Sakho. Great.But with Marko Arnautovic and Manuel Lanzini now out for a while, and Michail Antonio yet to return, we are in desperate need of players who can make things happen up top.
Image source, Getty ImagesWith this man?
January is never a good month to sign players and we need to let players go before we can recruit but we need bodies and we need them now. We don't want a bargain, we don't want loans, we want the owners to pay what they have to, to bring in the players that can come in and help us kick on.
David Blackmore from West Ham fanzine Blowing Bubbles Monthly
One from late last night, with Anthony Stokes leaving Hibernian by mutual consent, just six months into his third spell at Easter Road.
The striker, 29, has scored 11 goals since rejoining the club on a two-year deal in August.
However, he has been omitted from each of head coach Neil Lennon's three match-day squads in 2018.
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Don't spoil the Baggies' party, Mark!
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BBC Radio Cumbria
Sports editor Paul Newton: "Carlisle United boss Keith Curle remains hopeful of adding to his squad ahead of tonight's deadline despite missing-out on several targets with the possibility of at least one player moving out of Brunton Park."
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I think Newcastle fans are losing hope...
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Richard Winton
BBC Sport
Southampton are not confident of completing a deal for Spartak Moscow forward Quincy Promes before the window closes, with any deal now more likely to be struck in the summer.
The Russian club have rejected three bids for the 26-year-old Netherlands international, who BBC Sport understands has asked to leave Spartak during three separate meetings with the club president. The unsettled Promes also became embroiled in a training-ground fight this week.
Should the deal falter, Southampton are unlikely to look elsewhere at this stage.
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Manchester United fans are happy with the arrival of Alexis Sanchez.
Sum up your club's transfer window in a gif!
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German Bundesliga
Movement on the continent...
Wolfsburg have announced the signing of Switzerland forward Admir Mehmedi from fellow Bundesliga side Bayer Leverkusen on a deal until 2022.
BBC World Service's John Bennett: "Mehmedi started the season well but his chances were limited due to the emergence of the new Bundesliga star Leon Bailey - who will be a name to watch in the next transfer window."
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It has been a relatively quiet month at Selhurst Park, to be fair...
Describe your club's January with a gif!
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The winter transfer window is drawing to a close, but here is a chance to have your say.
Which of the following summer signings have had the biggest impact in the Premier League this season?
You can hit the vote button at the top of this page. Here are your options:
Aubameyang, Giroud, Batshuayi, still nothing officially completed. Any movement in the next hour?
The transfer window in England shuts at 23:00 GMT and at midnight in Scotland.
Motherwell have rejected an increased bid of £375,000 from Celtic for goalkeeper Trevor Carson.
The offer was submitted on Tuesday evening but still does not meet the Well's valuation of the 29-year-old.
Manager Stephen Robinson said it would be a "nightmare scenario" to lose his goalkeeper on transfer deadline day.
"It would have to be a very good bid to let Trevor go," Robinson said. "It would certainly make things very difficult for me."
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Another disappointed Newcastle fan here, but be honest, are you really surprised?
Has your club's January window panned out as you would have expected? Let us know in gifs...
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Virgil van Dijk to Liverpool
Image source, .Liverpool kicked things off in the January transfer window by splashing out a world record fee for a defender, signing Virgil van Dijk from Southampton for £75m.
Van Dijk had a dream debut, grabbing the winner against Everton in the FA Cup but hasn't quite yet plugged the leaky Liverpool defence. The Reds have conceded three goals in the two games he has played since the Toffees' fixture.
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Manchester United should to feeling pretty good following Alexis Sanchez's arrival, to be fair...
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Liverpool
We've run some of this month's transfer dealings through the SAM (Sports Analytics Machine), the super-computer built by Ian McHale, professor of sports analytics at the University of Liverpool.
Here's what it made of the goings on at Anfield:
Liverpool losing playmaker Philippe Coutinho to Barcelona will mean a drop in points of about 2.3 between now and the end of the season. Enough to put a top four place at risk?
Image source, Getty ImagesHowever, SAM reckons that Liverpool losing Coutinho and gaining Virgil van Dijk will mean a drop of 1.3 points between now and the end of the season. The impact on making the top four is interesting: the probability has decreased by 8% to 52%.