Andy Farrell says England’s ‘extreme’ training camp will reap rewards

• Coach believes 45-man squad has improved after gruelling tests• England due to take on France in August World Cup warm-upThe England squad flies back from Denver this weekend for a week’s rest after a gruelling two weeks in Colorado that has, according to Andy Farrell, brought the players even closer together.England took 45 players to the United States and they will all return home fit, despite contact work starting in earnest this week. The players will report to the training base in Bagshot after their rest to start preparing for the August warm-up internationals against France but up to …