Andy Farrell warns England not to be complacent after Wales injuries

• Farrell: ‘Warren Gatland will encourage a backs to the wall mentality’ • Coach says key injuries will not weaken WalesEngland have been warned that Wales’s World Cup injury issues could make them collectively harder to beat. Andy Farrell, England’s backs coach, said Warren Gatland will use the absence of Leigh Halfpenny and Rhys Webb as extra emotional motivation and does not believe Wales’s challenge has been seriously weakened.Farrell knows all about Gatland’s methods having been part of the coaching panel on the 2013 British & Irish Lions tour and rejects the idea that England’s Pool …