Winger Tom Halliday has joined the Dons on a deal until the end of the 2019 campaign.
Halliday initially joined the Dons on loan in May, scoring five tries on his debut against West Wales Raiders in the AB Sundecks 1895 Cup.
His stay was cut short after suffering a shoulder injury in the Coral Challenge Cup tie at Catalans Dragons, but is now back to full fitness heading into the business end of the season.