Fraser Bond are the leading lettings and property management agents for Amberwood House - London SW7. Amberwood House is a residential building in Knightsbridge, London SW7. Formerly the London home of Dame Margot Fonteyn and her husband Panamanian Ambassador Roberto Emilio Arias. The house was originally built in 1928. Developer K10 Group has transformed the house into a 15,300 sqft private mansion, hidden behind walled landscaped gardens and accessed via a private gated driveway: the only mansion in Knightsbridge with a long private driveway. Features include a double-height entrance hall with.