On the opposite bank of the river was a Classical Colonnade, which was washed away in the floods of the late eighteenth century.
The front was originally an open colonnade but was bricked up later.
Around the pool is a new colonnade with white columns in Dutch style.
There are three music practice rooms, accessible from the ground floor colonnade on the west side of the building.
At the side of the front entrance, the dining hall has full height glazing set back behind a simple colonnade, facing south.
This colonnade and rill water feature run under the building along the face of the adjacent Four Piccadilly Place line.