Just to add a little bit more to this. In Dublin today I tried to use the Google wallet BP emailed from the iPhone to use Fast-track. As that BP didn’t specify Fast-track the person at the entrance wasn’t accepting. Fortunately I’d managed to get the BP directly in the Android app that did say Fast-track.
I’d originally asked if he could just scan the barcode as wouldn’t that show the fast track as OK, but he insisted on seeing it on the BP before he’d scan it.