Gillingham are keen to bring Peterborough pair Charlie Lee and Chris Whelpdale back to the Kent club.
Utility man Lee and winger Whelpdale have been transfer listed by Posh following their promotion to the Championship.
The duo made four appearances each for the Gills while on month-long loans at Priestfield in November and December before returning to London Road.
Gills boss Andy Hessenthaler has expressed his desire to try and bring them back to the club this summer.
Speaking on Thursday morning, he told Gillingham's official website: "Of course we would be very interested in signing the pair."