Holyhead Port Closure Until January 15

[poffle]

Anywhere that offers one should also offer the other.

The name "standby" is a misnomer, they are more like an Anytime with slightly more restrictions, that being no Break of journey.

The difference between advance and standby is that advance has to be purchased before 18:00 on the previous day.

brfares.com shows the same conditions for both tickets apart from the advance purchase requirement.

Purchase flexible walk-up fares for any British train journey

Purchase flexible single/return tickets & Travelcards – in 3 clicks, at face value with no fees. Every British rail fare shown, railcard discounts included.

www.brfares.com

Most of the trains are TFW which don't have reservations anyway.

 

[Flying Snail]

The difference between advance and standby is that advance has to be purchased before 18:00 on the previous day.

brfares.com shows the same conditions for both tickets apart from the advance purchase requirement.

No it does not.
Advance is booked train only, just like all other advance tickets. They will be issued as only valid with mandatory reservations alongside separate coupons with listed trains that must be adhered to.

Purchase flexible walk-up fares for any British train journey

Purchase flexible single/return tickets & Travelcards – in 3 clicks, at face value with no fees. Every British rail fare shown, railcard discounts included.

www.brfares.com

Most of the trains are TFW which don't have reservations anyway.

TfL do not currently offer marked seat reservations but they do have counted place reservations for most routes for the purposes of issuing fixed itinerary advances.

 

[Mainline421]

The difference between advance and standby is that advance has to be purchased before 18:00 on the previous day.

Standby is walk up ticket valid on any train as long as its a permitted route and fully refundable. It can be issued without reservations which is useful for stations beyond Dublin (although technically the ferry segment is compulsory reservation)

 

[kevconnor]

Cheers. Any idea which online booking system does the standby ones or are they only available from a booking office? I'm not fussed either way

You can buy SailRail Standby tickets on some ticketing sites. I use the East Midlands Trains site for this very purpose.

I've included some screenshots which show how to select them. When you are on the train selection page, scroll to the bottom and you should see a hyperlink that says 'Compare all available ticket types' Click this link, and it should show you SailRail Standby tickets.