Subway is a US sandwich chain that sells 'Subs'. This paper outlines how an existing promotional offer was transformed into a successful brand building promotion with a fully integrated marketing campaign. The actual product, the submarine shaped roll, didn't change, but it was repositioned, re-branded as a 'sub' and re-launched. The regional trial became a successful national campaign that went on to be a global proposition. In the first regional test an investment of £400,000 over 11 weeks yielded an uplift of same-store sales of 12% year on year and 12% ROI. A year later, the test region return increased to 30%.