My training started and we had 2 weeks easter leave at week 5. To be honest I didn't really get the blues coming back as I was looking forward to it and the novelty of being in recruit training for Royal Marine Commando's etc.
My son started training similar time last year, it's not a problem as long as you have the right mindset and remember why you are doing this. Yes it's not great going back after 2 weeks leave but it's not a big problem if you don't make it one. Just associate with the right people rather than the negative guys who have decided to wrap.