Monzo

^ Step 1: Follow the link above ^

Step 2: Sign up and activate your card when it arrives

Step 3: Buy your next coffee with your Monzo card (or any other £5 spend) within 30 days

Step 4: Get £5 back - i.e the coffee was free!

Step 5: Discover Monzo is brilliant and start using it for your day-to-day banking