It's transfer deadline day and Scottish clubs are still scrambling to get deals done before the window slams shut. Follow updates of the moves as they happen HERE!

Celtic are hoping to conclude a loan deal for Manchester City youngster Patrick Roberts, who was at their League Cup semi-final clash against Ross County on Sunday.

Don Cowie has signed for Hearts, as Robbie Neilson looks to add a late addition to his Tynecastle squad.

Kristoffer Ajer's move to Celtic won't be happening but the Scottish champions have added Patrick Roberts and Colin Kazim-Richards.

Follow all the day's moves as they happen with our live blog below.

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8:30pm: DONE DEAL! As we reported earlier, Aidan Nesbitt has made the move from Celtic to Partick Thistle on a loan-deal to the end of the season.

7:05pm: Update Kilmarnock are also expected to complete a deal for Carslisle midfielder Gary Dicker.

6:55pm: DONE DEAL! Brentford midfielder Ryan Williams joins Inverness after agreeing to mutual termination of his contract.

With just under 6 hours of the transfer window left, there could still be a few deals in the pipeline. Dundee United and Hearts continue to negotiate over John Souttar while Jordan McGhee is attracting interest south of the border.

5:35pm: DONE DEAL! Nadir Ciftci has completed his loan deal from Celtic to Eskisehirspor. The Turkish forward has signed for the Super Lig side until the end of the season.

5.00pm: A flurry of deadline day activity! Gary Dicker will undergo a medical at Kilmarnock ahead of his move from Carlisle United, with Michael O'Halloran's switch from St Johnstone to Rangers also completed. He joins on a four-and-half year contract.

4.50pm: Bit of news from down south that might be of interest to clubs up here - Michael Higdon has had his contract cancelled by Sheffield United. He would be able to join a new club as a free agent.

3.20pm: Okay, so let's have a recap of what we're keeping an eye on for the rest of the day, until the window shuts.

2.45pm: Michael O'Halloran has arrived at Murray Park for his medical ahead of a move to Rangers from St Johnstone. The saga that has spanned weeks over this window seems to be coming to a close.

1:45pm: Steven Fletcher had been on the radar of Celtic earlier in the transfer window, but it now looks like he's on his way to France with Marseille on loan from Sunderland.

12.55am: DONE DEAL! Patrick Roberts has completed his 18-month loan switch to Celtic from Manchester City. Hear what he had to say on the move earlier today below.

12:15am: It had been assumed that with the loan signing of Billy King Rangers would not return for Michael O'Halloran, but they have made their third move for the St Johnstone forward today. Tyrone Smith reports that a fee has been agreed between the two clubs.

12.05am: Hearts have been interested in John Souttar all the way through this transfer window, and don't seem to be dropping it. Our very own Jamie Borthwick reports they have had a second bid rejected.

11.00am: Looks like Nadir Ciftci is on his way out of Celtic, and is set to join Turkish Super Lig side Eskisehirspor until the end of the season. He failed to make any kind of impression since joining from Dundee United in the summer.

10.35am: Reports in England claim that Stoke City are listening to offers for Scotland international Charlie Adam. He's fallen out of favour at the Britannia Stadium this season.

9.40am: DONE DEAL! Partick Thistle have made a deadline swoop, with Antonio German joining the Firhill club. The 24-year-old will wear the number 10 shirt for Alan Archibald's side.

9.35am: Good morning! It's the day every football fan looks forward to, transfer deadline day. You can follow every deal as they happen here with our live blog. You can also get in touch with us on Twitter (@STVSport) throughout the day.