Billy Vunipola could have a chance for Calcutta Cup clash

Vunipola underwent surgery after damaging his knee during last autumn's victory over Argentina.

Billy Vunipola could play a role in England's Six Nations clash with Scotland after being on the brink of winning his battle with a knee injury.

Vunipola is poised to make his comeback after three months out with ligament damage when Saracens face Newcastle in the Aviva Premiership on Sunday.