33 Holborn is quadrant-shaped in plan, with the principal fašade sweeping round from Holborn into New Fetter Lane. On the face of it the scheme is perhaps not one of the most inspiring to come from Foster's office (it does not even get mentioned on the web site), but the broad curving fašade and highly competent execution does help to lift it above the ordinary. The programme is comprised of two wings. On the East side of the plan (running North-South) is a fairly regular series of floor plates, whilst on the South side, the floors are triangular. Separating both sets of office space, is an irregular 'wedge'-shaped atrium. Externally, the main material is curtain walling. This is used extensively on the main, curved, fašade with the lower level protected by reconstituted stone louvers. On the other elevations, the louvers are used more frequently. Escape stairs form a feature at the rear corners.