Which charitable trust owns and maintains the bridge next to the City of London School?
City of London School: The City of London School, also known as CLS and City, is an independent day school for boys in the City of London, England, on the banks of the River Thames next to the Millennium Bridge, opposite Tate Modern. Millennium Bridge, London:  It is owned and maintained by Bridge House Estates, a charitable trust overseen by the City of London Corporation.
Bridge House Estates