Instructions:I tried the code v780 and got 12.5% off travel each way - that totals 25%. I saved over £50. worth a try. Other codes that are working are v650d and a221 (offering free upgrade).
A little tip that worked for me, Do not just accept the first quote you get. I was originally quoted over £320 for a return sail (fishgaurd/rosslaire) but started agian about 3 times. Using the code above it kept dropping in price and ended up under £200! I don't know if i was just lucky but worth a go.