[2] He is the elder son of Charles Marcus Mander, 3rd baronet of The Mount, by Maria Dolores (d. 2007), née Brödermann, of Hamburg, whom he succeeded in 2006.
[6] He was co-founder of Mander Portman Woodward in 1973, a group of independent sixth-form colleges based in London, and of Sutton Publishing in Gloucester.
He is the author of Varnished Leaves, a history of the Mander family (2004), Country Houses of the Cotswolds (Aurum Press, 2008; Rizzoli, 2009, reprinted 2016), and of a personal memoir, Owls among Ruins (2022).
[11] The Trouble with Home, a documentary film about the life of the family at Owlpen Manor, was made for HTV West and screened in July 2002.
Mander married Karin Margareta, younger daughter of Gustav Arne Norin, of Bromma, Sweden, on 24 June 1972.