The Jaguar website will charge you around £169 for the update. There are other websites around that may promise the same service for a far lower cost, however, I would take great caution downloading anything from any site that isn't known to you. Having seen a few of these sat nav update software sites in my time, a lot of them are scams that want to harvest your data. If you don't want to pay for the update from Jaguar, my advice would be to buy a used satnav online or to download a navigation app like Waze (which is free and excellent) — presuming that you have a smartphone.