Award-Winning Precision

Design Rationale Recognised for Quality at Heathrow Terminal 3

We’re proud to announce that Kostadin Terziyski, Site Manager at Design Rationale, has been awarded a Quality Award by Mace for outstanding performance on our work at Heathrow Terminal 3.

This recognition highlights not only our team’s technical excellence in architectural glass and metalworks, but also the precision, attention to detail, and uncompromising safety standards that define every DRL project.

Kostadin’s leadership has been instrumental in delivering high-quality finishes under the rigorous demands of a live airport environment. His management style - marked by meticulous planning, clear communication, and a relentless focus on safety - has ensured our work not only meets but consistently exceeds expectations.

Working closely with Mace, we’re proud to contribute to the transformation of Heathrow Terminal 3 - bringing together sustainability, safety, craftsmanship, and care at one of the UK’s most vital transport hubs.

Congratulations to Kostadin and the wider team for setting the standard in quality and safety.