Poppy1
I'm flying from Manchester next week for just 1p plus the credit card charge. So it is possible. Most times the 1p offer has a heap of taxes added on. The 5 or 10 euro fare with no taxes usually works out cheaper.
It's a case of registering on their website for email alerts, watching the website and been flexible in when you can travel.
From my own observations with dealing with Ryanair, booking too far ahead doesn't always get you the best value fare. For a Sept flight I would probably wait a while longer before booking. Just my idea.
Hope this helps