Profile: Werner Sobek

This month's letters include discussion on building control compliance forms, structural engineering ethics and more.

The main barriers to delivering low-carbon design on residential projects are not the ones you might expect, according to Scott Boote. He talks to Helena Russell about what needs to change – both in engineers' perceptions about materials and process, and in the wider sector.

As head of sustainability across Ramboll's building structures division, Brogan MacDonald has made impressive progress in her short career so far. A year into the role, she talks to Helena Russell about how she got here, where she's going, and the importance of positive role models.