The parqueted lobby of Arundel House, home to the International Institute for Strategic Studies (IISS), has been welcoming more well-heeled business figures from the City of London recently, according to figures from the think tank's recently filed financial report. 

Revenue from operations at Arundel House Enterprises Ltd, the IISS subsidiary which undertakes private sector consultancy work, nearly doubled in 2024 to £1.1m, after the think tank's decision to expand its advisory offering. 

In February,