Thanks for those replies, sorry, should of said we are ideally looking at used as don't want as much expense on our first van as a family, I have looked at the new ones which are similar to what I have seen in a Bailey at a main dealer.
Martin - I do really like the idea of the Triple bunks as with them being all under 3, I want to put them in the 'bedroom' at the end to minimise noise and disturbances when they are sleeping from about 7pm onwards and I beleive side bunks will only have a curtain divider,