Launching on Independence Day? Can't see that happening myself but stranger things have happened!
Kind of hope it launches with the third beta release of iOS 9.
From a post by one of the mods on NatWest's Forums and Ideas section of their site (posted yesterday):
- The live date will be announced by Apple shortly and from that date you will see the option to add a card to Apple Pay in Passbook. You will be able to start adding your cards as soon as that happens.
I had been suspicious that the date was perhaps coded into iOS 8.4 so tried changing my phone's date to August but it didn't cause the option to appear (with region set to UK).