[Traincustomer]

On the yield aspect is the 50% an average figure or does it refer to specific lines/the UK side of things? Certainly the differential over there would be higher.

Looking at fares along the Dublin-Rosslare line (via Fishguard) the differential is largely marginal and fluctuates between the SailRail fare being a bit higher, about the same or a bit lower (than buying separate tickets). For example:

Enniscorthy to Cardiff €50 single (SailRail bought in advance)
Bought separately (single train ticket on outward day of travel & SailRail advance return booked by day before &collected on check-in at the port) it's also €50.

Wexford to Swansea €50 single (SailRail bought in advance).
Bought separately it's cheaper and the total comes in at €45.60.

Wicklow to Carmarthen return €108 (SailRail bought in advance). Bought separately it's the same or a tenner cheaper if an online return can be purchased for the Wicklow-Rosslare leg.

Dublin Connolly to Llanelli €108 (SailRail bought in advance). Bought separately it's €112 with potential to reduce that to under €100 (cheaper than SailRail) if an online fare is bagged. Problem though that it's not possible to book online for the connecting train in the evening (16.37 ex Connolly) but is possible to book online for the connection out of Rosslare in the morning (the 07.20).

The likes of Cork to Manchester (via Holyhead) seem to be where the higher percentages come into play e.g. Advance SailRail is €60 single whereas buying separately on the day would be €108. But buying separately in advance and bagging a €14.99 online single for Cork-Dublin could see the total being €54.99.

So a case of several variables and it seems much of a muchness in these cases.