Cobham Park Gardens & Darnley Mausoleum, Kent

Left derelict in 1950, this imposing 18th-century mausoleum was so severely vandalized it seemed beyond repair. The practice was commissioned to return the Grade I listed memorial to its former glory after nearly 60 years of decline. The two-storey building, designed by prominent architect James Wyatt for the 3rd Earl of Darnley, is an irregular octagon constructed from crisply detailed Portland stone. The eleven-year, £2.5m restoration project entailed painstaking repair, cleaning and reinstatement work to secure the future of this Georgian gem. It formed part of a larger landscape management scheme, which included repairs to Wyatt's Grade II* listed Dairy, the Aviary and Pump House.