Or a 250g parcel (own packaging)  through AP My Post Business, depending on your savings band. Also good to remember that purchasing AP Tracked Letter products does NOT count towards your My Post Savings Band - I think they're the only AP product that doesn't. So I often send what COULD be tracked letters as a 250g parcel, depending on what zone the address is; on my savings band it is almost as cheap AND counts towards my AP Saving Band.