You're in the UK, so most of us won't know but we do have several members that will. Hopefully they'll answer you.
And by free delivery do you mean normal post mail? I wouldn't recommend that unless they can do overnight deliveries, because chameleons shouldn't be left in a box more than overnight, really. Some unfortunately have gotten lost in the mail for several days before arriving but they will definitely look worse for it, and a young chameleon probably wouldn't survive.