England’s World Cup training camp has barely started but already they are a man down. David Strettle is not among the players who have reported to Bagshot for almost three months of pre-tournament activity, the wing having advised Stuart Lancaster of his decision to withdraw from the 50-man squad following his move from Saracens to Clermont Auvergne. The 31-year-old will be replaced by Bath’s Semesa Rokoduguni, 27, the serving British Army soldier from Bath who won a solitary cap against New Zealand last November. Having signed his three-year deal with Clermont, Strettle is keen to help his family settle in France before the start of the Top 14 season in August. Lancaster, the England coach, has stuck firmly to the Rugby Football Union’s policy of not picking players based in France and Strettle’s decision effectively ends his Test career, which has seen him win 14 caps since his debut in 2007. “It is disappointing but David and I have chatted and he feels that, having made the move, he wants to get on with forging his new career,” Lancaster said. “We both agreed it was the best course of action for him to withdraw from the squad.” Strettle may also…