The update service is available free with the lose leaf versions of Pooleys, not the spiral bound, and only for the current year. If you buy a lose leaf one you should receive a form with it that you send back to Pooleys. If you've got the spiral bound one - it's cheaper and there is no update service. You can, however, look on the infamous NATS website and get all the up to date airfield/navaids info from the AIP. And it is free! I do frequently question my wisdom in spending thirty quid a year for something I only ever use to look up about three airfields.