Going forward with Aerlingus It would be nearly cheaper to book any time their is not a sale as some times the price goes up before sale and even after reduction the price is dearer than presale.
I noticed on 12 day sale even when you look very early in Morning some seats are still charging a fee before tax.
Also noticed last week one sale was in conflict with another sale on same route eg no fare and pay taxes v 30% off.
Once the new year comes I can see Ryanair taken a load of business off Aerlingus on Uk Routes as they do some excellent deals on some weekends during summer for London Gatwick.
I now see Ryanair being a lot more honest than Aerlingus with their Advertising