Grosvenor Gardens House is a Grade II-listed mansion block at 23–47 Grosvenor Gardens, Belgravia, London. Queen Elizabeth The Queen Mother may have been born there in 1900. David Niven was born there in 1910, and William Henry Blackmore killed himself there in 1878. In 2017, the building was the subject of a £132-million High Court trial for damages brought against Christian and Nick Candy by Mark Holyoake, a former friend and business associate who had financed the purchase of the property via a loan from the brothers. The action was unsuccessful, but the course of the trial put the Candys' business practices under an unflattering spotlight. [1][2]