One of the features of the Millennium Dome is an elegant concrete structure which has been incorporated into the design of the Great Tent itself, though not enclosed within it. The reason is simple: it is a ventilation funnel for traffic from the adjacent Blackwall Tunnel. The shaft, and a similar one nearby next to the Reuters building, was designed by no less than Terry Farrell, when he was a fledgling architect at the Greater London Council in the 1960s. Terry now thinks the structures should be listed, and has written to Chris Smith to tell him so. Who would have thought that our most prominent post-modernist of the 1980s and 1990s might be remembered officially for some distinctly modernist concrete?