A great concrete "prow", encasing the air conditioning ducting, protrudes towards the Thames along the side of the auditorium at roof level. The walkway area below this feature is on the roof of a utility building, and a branch of the restaurant chain Wahaca has been installed in a set of containers there, in 2012. Ventilation services are provided from a plant room on the roof of the Purcell Room via a massive concrete duct between the buildings leading into the QEH roof, and a concrete tower leading to the concrete duct on the north-east edge of the foyer building roof.
