“It is a big test for Luther to see if he can deal with the pressure and if we are going to be successful at the World Cup, players like him need to deliver on the big stage,” Lancaster said, although he also stressed just how important an asset the Northampton centre had been in the Six Nations. He started ­every game and England were the top try scorers with 18. “Luther knows it is a big challenge and I am expecting a big response.”