S&R tickets involving Fishguard don't appear to exist on the GB ticketing system.

Best option is then to call Stena and book manually through them.

If Stena says no let me know and I'll follow up with the Stena route director for Rosslare - Fishguard

Where did you hear this? I've plugged the time and date on www.thetrainline.com and nothing new is coming up yet for after 22 May.

I was told it in good faith and legitimately as a result of representations I've made on the SailRail issue since 2009. I do not wish to go posting details of Manager X in Company Z type of stuff here other than to say I'm just a humble user and not party to any inner workings but wouldn't have been told this in the correspondence I received if it wasn't true and going to happen.
Timetable should be out in next few weeks which will give exact details.
Hope this reply doesn't come across as being short as it's not intended to be:)

I recommend not using that website as it charges more than booking through any train operating company's site.

Having said that, www.nationalrail.co.uk isn't finding it either. It may not have been loaded into the system yet.

The UK system normally loads 8-12 weeks out so if its not there now its likely not going to be there. If it is, it assumes there is a connection somewhere to get you to Crewe

I would ask all posters not to post timetable information like this until there is positive proof of the exact timings and running dates, this is of even greater significance with international journeys

Seen as though we were talking about this earlier, I saw these faqs on the arriva sailrail website
http://www.arrivatrainswales.co.uk/SailRail/FAQs/

While I posted it in good faith and with a helpful intent, I have nonetheless removed a section of my original post.

Just to confirm that a ticket from Cardiff Bay to Dundalk can be routed HOLYHD STENA CIV, HLYHD IRISHF CIV, or HLYHD SWIFT CIV.

However, if you pick a different journey like London Terminals to Rosslare Harbour, you're offered FSHGRD STENA CIV instead.

Irish Ferries SailRail booking facility now online (including provincial stations):
 

Gentlemen (and ladies), the online booking facility is now available on the Irish Ferries website. It must have been uploaded yesterday or today as have been keeping a regular watch for it and it wasn't there last time.

Two very pleasing points are that (1). WRC stations and Midleton are included and (2). it allows you to book extras viz. Club Class and or a bicycle.

All Éire stations appear to be in the list though not Dublin Suburban ones which traditionally have not been available for SailRail bookings (so the likes of Dunboyne would require one to purchase a separate ticket to town/ Dún Laoghaire).*

With doom and gloom all around it's good to see this "can do" approach. Compliments due in my view to Irish Ferries for bringing this to fruition.

(* Footnote - am talking in general in paragraph 3. If booking online with Irish Ferries one would have to buy a ticket/use a pass/Smartcard from given suburban station to town. In the case of Dún Laoghaire the same but only Stena sail from there (HSS once daily at 1315 from 1st April) and no online booking.)

I thought the Stena Express would do the initial sailings but the website confirms it's the HSS (Stena Explorer).

A brilliant addition, (if a long time coming). Booking over the phone was probably a poor use of staff time, and the internet will be able to handle the surges in bookings that occurred during last year's weather related incidents much better, though I am sure it required significant investment. Let's see if Stena follows...

Here here!
My thinking is that the actual issuing of tickets will remain unchanged (i.e. the coupon tickets we've had for decades) and that the online system will simply generate a pick list of what the customer wants, to be processed by the booking clerk in the usual way.

There is no reason why Stena Line and Irish Rail shouldn't be able to do likewise. The system required would essentially be the same leading to the possibility of a centralised SailRail booking facility (just my point-and not based on any knowledge/assumption that this will ultimately happen).

My only concern is that the online system wouldn't become the exclusive means of booking SailRail. Hopefully the online system will attract a strong level of bookings but the facility for booking in person at both the ports and certain provincial railway stations needs to remain (internet great but does not suit all people at all times in all places). Too often these days the assumption is made that everyone can do everything online.

Stena already have a system but only if you are UK based

Irish Rail will sell by phone or at main booking offices (and given you have to start from a train station...) Under normal circumstances its walk up and go

Downside with online booking is it is endorsed on specific services/dates not the blank coupon Irish Rail uses

I am happy to help facilitate bookings (using my UK address) for people who need assistance.

True, but hardly comprehensive as you have to be going from one of 10 departure stations in the UK (out of 2400).

Hi Mark, I called Stena today and they told me they are unable to book onward travel from Rosslare on Irish Rail. They told me it had been possible in the past, but was no longer the case. Any ideas?!

Hmm, the excuse is its a one way journey. There is no way to get from Dublin to UK via Rosslare without a ridiculous layover in Rosslare

So was it accepted until the Rosslare-Waterford line was closed?

IIRC There was a Waterford-Rosslare train that connected to the 9pm boat and a train on from Fishguard after that arrived

That is a truly bizarre reason!

I was planning to get the overnight ferry from Wales to Rosslare and then get the northbound train at 07:50. I know there’s a bit of a wait at Rosslare after the ferry arrives, but I prefer the train than BÉ.

Would IÉ be able to book that S&R journey for me on a CIV paper ticket? If not I will just have to book the IÉ train separately.

If you try to get from Dublin to the UK its not easy via Rosslare.

All Sail/Rail tickets are issued under CIV rules, Irish Rail could certainly issue the ticket if the journey originated in Ireland but as it doesn't they probably can't

In this case you are probably best booking to Rosslare and then from Rosslare onwards. I did meet the route director in Fishguard last Summer so we have a contact in Stena line to chase.