The College required a building of high status that would form an attractive location for both students and conference delegates,providing 75 study bedrooms,8 Fellows sets and conference and seminar rooms. The building is finished in high quality natural materials. Its sinuous form allows it to weave between important preserved trees whilst its mass and modelling respond to adjacent important university buildings. A new Porters' Lodge forms an ensemble with the building and provides the location for an air intake to two 60m long earth tubes. These temper the air used to ventilate the building to a cellar temperature of 12 degrees, heating in the winter and cooliong in the summer. This system works in conjunction with highly efficient heat exchangers and the super insulation of the walls and roof to conserve energy.