Stuart Lancaster sure he has the nucleus of his squad as he prepares to take England to the 2015 Rugby World Cup So many things have happened in a year but it is interesting to sit here a year on and remember where we were as a group. We made 15 changes this time last year. It wasn't just the 15 changes, it was the significance of the number of caps that were left in that side at the time. We have a lot of lads like Owen Farrell, Brad Barritt or Manu Tuilagi who are under 25 and should be around for a long time. But you never want to shut the door on some of the Saxons players who have been selected, or lads outside the Saxons at the moment. Even now, with the evolution of the team, you see an experienced player like Tom Palmer drop out of the squad and a younger player like Joe Launchbury come in. Billy Vunipola is probably a good example of that as well. I think he is someone who has got tremendous potential. It is a key position, No 8, so I want to make sure he is given the development he needs. Vunipola is officially in the Saxons but he will train with England as injury cover for Tom Croft, bringing immediate competition to Ben Morgan and Thomas Waldrom. Clark clearly features heavily in Lancaster's plans following his recall to the squad after serving a 32-week ban for breaking the arm of Leicester hooker Rob Hawkins. Lancaster has known the combative Saints forward, who can play second row and back row, since he was a 14 year-old in the Leeds academy and he had no qualms about offering him a second chance. "I have watched his games closely and observed his behaviour to make sure he is on the right side of where he should be," Lancaster said. I know what he can offer.