Peterborough have completed the signing of defender Tom Williams on loan from League Two rivals Wycombe.
Williams has already had two spells at London Road and manager Darren Ferguson is delighted the 27-year-old is back.
"He knows the club, he's a good size and I believe we have a bargain on our hands," said Ferguson.
Jeff Hughes' loan move from Crystal Palace has not been made permanent, but ex-Livingston defender Scott Mitchell, 22, has signed a month's deal.
Meanwhile, young Posh winger Alifie Potter, who is currently on loan at non-league side Havant & Waterlooville, has been offered a new two-and-a-half-year contract by Ferguson.