There was comment on previous thread about €9 fares needing booking a month in advance. Not sure that's always the case - I have booked an "insurance" flight BGY-EMA as I'm not 100% sure about local transport getting me up through Croatia to TRS. That was still just €9, booked tonight for 9th Oct.
However, these flights only seem available into the regionals - I didn't look for the outbound leg as I've got that sorted, they might not be so keen to give you a flight for £9 with APD at £12.