Just had this from O2 on twitter after i asked about switching to a nano sim and buying the phone outright.
O2: @zimpaz Hi James, the Apple store or O2 store will be able to provide with the correct sim at the time of your purchase 🙂 (44 seconds ago from PulsarEngage in reply to zimpaz)
O2: @zimpaz Hi James, the Apple store or O2 store will be able to provide with the correct sim at the time of your purchase 🙂 (44 seconds ago from PulsarEngage in reply to zimpaz)