Leyton Orient will be without loan duo Luke Summerfield and Andros Townsend for the FA Cup trip to Tranmere.

Plymouth midfielder Summerfield and Tottenham winger Townsend have not been given permission to play in the competition by their parent clubs.

The Os also have a major doubt over centre-half Tamika Mkandawire, who suffered concussion and required six stitches in a head wound during last week's 2-2 draw with Southampton. Youngster Luke Ashworth is set to deputise.

Adam Chambers has recovered from his calf problem only to take a knock to his back playing for the reserves which will keep him out, but fellow midfielder Sean Thornton is in contention after 10 weeks on the sidelines with a knee injury.

Goalkeeper Jamie Jones is also fit after a head injury and ready to challenge Glenn Morris for the gloves.