England boss Stuart Lancaster has added Saracens back-row Will Fraser to his squad after Ben Morgan was ruled out of the weekend's trip to Ireland.
Morgan suffered an ankle injury in Saturday's win over Scotland, therefore Fraser, who has impressed for his club this season, has been added to the fold.
The RFU confirmed via Twitter: "Will Fraser of Saracens will join squad as cover for Morgan, Lancaster was impressed with his performances in both Saxons games."
Ireland are also understood to have a host of injury troubles ahead of the Six Nations meeting in Dublin.
