Summary: Deputy leader of Kensington and Chelsea council Daniel Moylan is this week's special guest, speaking about why the Commonwealth Institute redesign deserves the go-ahead, Richard Rogers' resignation and Euston arch. Also this week, BD talks to French architect Anne Lacaton of Lacaton & Vassal, the key note speaker at this week's RIBA's Changing Practices symposium, about how architects should engage with politics and economics.