Paperless receipts and digital rewards startup Flux has teamed up with Costa Coffee to trial its tech in a number of central London stores.
The trial will begin with a first phase of cashback rewards via Flux's challenger bank partners Starling and Monzo, which is in a closed pilot, before expanding from there to explore providing users with itemised receipts inside their banking app.
Flux is also launching its partnership with Barclays Launchpad, the bank's early adopters platform for testing new features, before the feature is evaluated to go live to all Barclays' customers in their mobile banking app.
Costa Coffee joins Flux's other retail partners that are currently trialling its services, including on-the-go food retailers Eat and Pod.
Founded by three former employees of digital banking unicorn Revolut, Flux was a product of the Barclays Techstars accelerator program in 2017.
Ruchir Rodrigues, managing director of digital banking at Barclays, said: "We are thrilled to see a member of our 2017 Barclays accelerator program successfully integrate with the Barclays Launchpad mobile banking app.
"This is yet another sign of our commitment to working with exciting partners to bring new and innovative products and services to our customers."