Billy Vunipola faces three-month absence after surgery on broken left arm

• Problem for Eddie Jones and England with shortage of No 8s
• Mako Vunipola and Nick Isiekwe also injured in win at GlasgowBilly Vunipola, who has started only three of England’s past 19 Tests, will miss the four-match series at Twickenham next month after breaking his left arm at Glasgow on Sunday.The Saracens No 8 will have surgery on Tuesday and is expected to be out of action for 12 weeks. Last January he fractured his right arm in another European Champions Cup encounter, a