Hartmut Reiner, Business Developer and Senior Underwriter for insurance giant Munich Re, speaks to TunnelTalk Editor Shani Wallis at Bauma Munich 2016 about the growing risk profiles of ever-larger and ever-more complex underground projects. As tunnel diameters become larger, as the technology advances, and as contractors come under pressure to meet tighter and tighter schedules, the insurance industry forsees a time when insurance cover will become increasingly difficult to arrange.