Finally, with less than a week till the window ends, the Lions made their first signing of this January transfer window. Jason Shackell, 34, joins Millwall on loan from Derby County with a wealth of experience. He has Premier League experience, and has been excellent for the Rams for a number of years. Shackell's experience and guidance should help the likes of Jake Cooper and other youngsters in the squad, but particularly Cooper given the former Reading man plays in the same position. Neil Harris has challenged Shackell to earn a permanent contract at The Den, following the admission that Gary Rowett is unlikely to offer him a new deal. I would certainly expect Shackell to prove his worth.
"I'm really pleased to put pen-to-paper - really happy. After speaking to the manager, I'm excited to get going at a great club," he said.
"I've overcome some injuries in the last year, so I'm now fighting fit. Millwall have done really well recently and have a good squad with some good players and that's something I'm super excited to be a part of.
"We've got some experienced people here and I'm looking to try and add to that group. I'm very vocal on the pitch and I will do my best to get my messages across to the younger lads.
"I try and keep it simple like most people in my position do! I try my hardest to play well and talk to organise the team.
"I've been to the top of this division with Burnley, as well as a little bit with Wolves and Norwich. Its a tough division where anybody can beat anybody - the lads have done really well so far this season and I'm happy to be here and help.
"I'm hoping to be involved in some capacity this Saturday against Rochdale in the Emirates FA Cup. It will be nice to get that buzz back again regarding being in a matchday squad."
"I am really pleased Jason Shackell has come in," Harris told millwallfc.co.uk.
"We have been chasing an experienced centre-half over the course of this transfer window.
"People might look at it and think "that's unusual for us to go and sign a 34-year-old," but I have done it because he is hungry. He is a really good one for us to bring in.
"I love what we are currently doing here at Millwall; we have a great group of lads and some good young kids coming through, but I felt like we maybe need a bit more experience.
"You can never have too many experienced players in the team or in the squad to lead. I felt that in the back-line we maybe needed another voice and some guidance.
"If we want to keep progressing as a team, as a squad, as a club, then our standards have to keep right up there. By bringing in senior players who have been there and done it in the Premier League, as well as at the top of this division, can only guide us as a group."
"He hasn't played a lot of first-team football recently but he is fit and may well come in," Harris added.
"It's a possibility that he may come into the squad this weekend, yes."
From what I have heard through the grapevine, Harris is still looking for a winger, and possibly a forward option. The hunt for a winger will intensify given Aiden O'Brien has just picked up an injury that is set to keep him out for at least four weeks.
There is only one man that Millwall fans will be interested in seeing linked with that forward role- Tim Cahill. Further talks have been held with Harris, and rumours have it that Tim Cahill has booked flights to the UK. Cahill's aerial prowess, combined with his popularity would certainly boost Millwall- both on the pitch, and financially.
In terms of outgoings, only Kris Twardek has been linked with a move away- on loan, to an as yet unnamed club. This is likely the right decision, given his first team football will be limited at The Den and Twardek could gain real confidence and experience in League One or Two.