Sybil was owned by the then Chancellor of the Exchequer Alistair Darling, who lived in 10 Downing Street while the then Prime Minister, Gordon Brown, lived in the larger 11 Downing Street.
Sybil dimiliki oleh Menteri Keuangan Alistair Darling, yang tinggal di Downing Street Nomor 10, sedangkan Perdana Menteri Gordon Brown tinggal di Downing Street Nomor 11 yang lebih besar.