For all the latest deals and breaking transfer news, go to the BBC's Transfer deadline day live page.
The transfer window closes at 23:00 GMT on Friday and the BBC will bring you the latest on every move across television, radio and online.
It promises to be yet another busy deadline day as clubs scramble to sign new players to boost their ambitions.
Whatever unfolds, here is how the BBC will keep you up to date.
Follow our live text commentary from 07:00 GMT on your computer, tablet or phone via the BBC Sport website or app.
We will bring you the latest news, views, speculation and done deals from our reporters around the country.
Our transfers page will capture every move, while each club page will be updated with the latest transfer stories concerning that club.
We will also be tracking the big moves in Europe and beyond, including the main ins and outs in Spain's La Liga, Italy's Serie A, Germany's Bundesliga and France's Ligue 1.
There will also be updates throughout the day - as well as the opportunity to give your reaction - on the BBC Sport Facebook page.
Our reporters, who will be across the country monitoring every move, will also be sharing their photos from behind the scenes on the BBC's Instagram page.
There will be regular transfer updates throughout the day on the BBC's national and regional radio stations up and down the country.
Radio 5 live will also monitor the final few hours of the transfer window with a special Deadline Day edition of 5 live Sport, which will be hosted by Mark Chapman.
He will be joined from 19:00-23:30 GMT by a number of guests, among them ex-Liverpool midfielder Danny Murphy, former Arsenal defender Martin Keown, ex-Tottenham boss David Pleat and former Wigan manager Owen Coyle.
Also in the studio will be journalist Rory Smith from The Times and European football expert Tor Kristian Karlsen, who will monitor all the major deals across the continent.
The BBC's World Service will also be tracking the big deals from around the globe, with reporters in Europe, Africa and South America.
Dan Walker will present a Transfer Deadline Day special edition of Football Focus on BBC One from 23:25 GMT.
He will be joined by Danny Murphy, Martin Keown and Owen Coyle to round up the day's events.
Dan and our team or reporters will also bring you the latest transfer news throughout the day via the Red Button, which can also be viewed via the BBC Sport website.
A Deadline Day special will run from 13:00 to 23:15 GMT and feature regular updates from the BBC Sport centre in Salford.
There will be regular transfer news on national and regional television stations across the country as well as BBC World.
The News Channel will broadcast a Transfer Deadline Day edition of Football Focus at 18:30, presented by Dan, that will also be streamed on the BBC Sport website.
And don't forget...
You can read the latest news, listen to 5 live and watch the TV coverage via the BBC Sport app on your smartphone or tablet.