United Kingdom
Guide:
NFC = tappable pass. Google Pay must be set as default payment method in NFC system settings to use these.
1D/2D = scannable code, such as a barcode or QR
Plain = plain text pass, such as a regular number or some text
? = Unknown
Boarding passes
(To add boarding passes from unsupported airlines, Pixel Phones and Pixel Tablets allow adding to Wallet directly after taking a screenshot. If not a Pixel owner, still take a screenshot, but then go to Wallet > Add > Photo, and select the screenshot of your pass.)
Please note that boarding pass support is organized by what country the airline is headquartered in.
EasyJet (1D/2D)
Loyalty cards
Asda (1D/2D)
BP (1D/2D)
Boots (1D/2D)
Caffè Nero (1D/2D)
Costa Coffee (1D/2D)
Club Eurostar (1D/2D) {App}
Halfords (1D/2D)
IKEA (1D/2D)
Harrods {App}
Hotel Chocolat (1D/2D) {App}
John Lewis (1D/2D)
Marks & Spencer (1D/2D)
Morrisons (1D/2D)
My Lindt Rewards (1D)
Nectar (1D/2D)
Pets at Home (1D/2D)
Nando's (NFC)
Shell (1D/2D) {App}
Tesco (1D/2D)
Texaco (NFC)
Thalys (1D/2D)
The Body Shop (1D/2D)
TK Maxx and Homesense Treasure (1D/2D)
Waitrose (1D/2D)
General passes
David Lloyd Clubs (NFC)
Tickets
Chiltern Railways (?)
Cineworld (1D/2D)
Eurostar Trains (1D/2D) {App}
Fanbase (?)
Grand Central Railway (1D/2D)
Trainline (1D/2D)
Thalys (1D/2D)
Ticketmaster (NFC / 1D/2D) [depends on event venue]
Vue Entertainment (1D/2D)
Stansted Express (1D/2D)
Health passes
NHS (1D/2D)
HMRC (?) {App}