Peterborough United have signed on-loan Middlesbrough defender Christian Burgess for an undisclosed fee.
The 22-year-old only joined Posh in a temporary switch last earlier this week, but the move has now been made permanent.
Burgess has agreed a four-year contract at London Road, and made his debut in Tuesday's 2-1 defeat to Sheffield United.
"I am pleased to sign Christian. It is a good piece of business from the football club. He is player that has been on the radar for a little while and he will bring competition to the centre back positions."
Peterborough United manager Darren Ferguson hopes striker Britt Assombalonga succeeds at new club Nottingham Forest - despite losing him two days before the start of the new League One season.
Assombalonga moved to the City Ground having spent just one season at London Road. In that time the 21 year old former Watford striker scored 33 goals, with all bar 10 coming in the league.
"The timing could be better, but you can't hand pick what day or what month of someone's going to come in for one of your players. It's the way football is.
The boy made his mind up that he wanted to leave and you've got to respect that. And I have to say good luck to the boy because he was fantastic for us in the short spell he was here."
Assombalonga was the second striker to leave Posh this week. On Tuesday Nicky Ajose completed his move from London Road to join another Championship side, Leeds United.
The former Manchester United trainee, however, was one of a number of players transfer-listed by Posh following their failure to win promotion from League One in May via the play-offs.
Highly-rated Peterborough United striker Britt Assombalonga has joined Championship side Nottingham Forest in a £5million deal.
The 21-year-old was in Nottingham this afternoon for a talks and a medical, and has now signed a five-year contract at the City Ground.
Assombalonga became Peterborough's club record signing when he joined from Watford for £1.5million last summer.
He scored 33 goals for Posh last season as they made the League One play-offs.
"After receiving what will be a record fee for a League One club and for Posh, I told the Gaffer (Darren Ferguson) I would turn the final bid down.
Once the Gaffer spoke to Britt and his father, it was clear he wanted to progress, speak to Forest and conveyed he was in no way in the right frame of mind for the game against Rochdale on Saturday should this opportunity not be afforded to him.
He will be missed by all of us at the club and we will watch his career go from strength to strength over the coming years, knowing we played a big part in that happening."
On completing his move, Assombalonga paid tribute to the Posh fans.
"I would like to take this opportunity to thank the chairman Darragh MacAnthony for granting me this fantastic opportunity with Nottingham Forest. I would also like to thank the manager Darren Ferguson, the football management team and all the staff at London Road for their help, advice and guidance since I joined the football club.
Finally I would like to thank the Posh supporters. Ever since I walked into the club last year, they have been superb and I will always remember that support. I firmly believe the football club can have a fantastic season this year because there are a lot of talented players in that dressing room."
Peterborough United forward Nicky Ajose has joined Championship side Leeds United for an undisclosed fee.
Ajose passed a medical at Elland Road earlier this afternoon, before signing a three-year contract.
The 22-year-old was placed on the transfer list by Posh, and spent time on loan at Swindon Town last season.
Peterborough United forward Nicky Ajose is closing in on a move to Championship side Leeds United.
The 22-year was absent from yesterday's pre-season photo shoot at London Road, sparking rumours that he would soon be heading out of the club.
It's understood that Leeds have now agreed a fee with Posh for the former Manchester United man, who will undergo a medical this afternoon.
Ajose enjoyed a successful loan spell at Swindon Town last season.
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Posh have signed their second player inside of 24 hours.
Peterborough have signed Michael Smith from Bristol Rovers for an undisclosed fee.
The former Pirates right-back has joins on a three-year contract.
Peterborough United have announced their latest signing.
Tottenham starlet Kenny McEvoy has joined the London Road side on a season-long youth loan.
The 19-year-old winger says he hopes to break into the first team. He told the club website: "It is good that I have been able to join in pre-season as I can get to know the lads before the season starts."
Peterborough United manager Darren Ferguson has signed a new three-year contract with the club.
Posh missed out on promotion via the League One play-offs last season but Ferguson did guide them to success in the Football League Trophy at Wembley.
Meanwhile, Assistant manager Kevin Russell is leaving London Road.
Gavin Strachan has been promoted to first team coach as part of a management restructure.
Peterborough United have completed the signing of Shrewsbury Town winger Jon Taylor for an undisclosed fee.
The 21-year-old had attracted interest from a host of Football League clubs, but Posh jumped ahead of the queue to secure his signature.
Taylor has signed a three-year contract at London Road and is the first arrival at the club this summer.