Brad Barritt injury adds twist to Stuart Lancaster’s World Cup choices

• Centre has a tight calf and will not face France on Saturday• Luther Burrell likely to partner Jonathan Joseph in ParisStuart Lancaster freely admits one position above all others is preoccupying him as he finalises his World Cup selection plans. The perfect blend at centre is continuing to prove elusive and the news that Brad Barritt is nursing a tight calf has added a fresh twist to Saturday’s penultimate pre-World Cup tango against France.Barritt’s injury is not thought to be serious but it does give Lancaster some timely leeway as he seeks to identify, once and for all, his optimum balan…