Cyril Sjöström was born in Helsinki to architect
Einar Sjöström and English opera singer
Phyllis Eleanor Sjöström née Mardall. He studied at the
Nya Svenska Läroverket (New Swedish School) in Helsinki and moved to London with his mother in the mid-1920s after his father's death. In England he began using his mother's maiden name Mardall as his surname, and obtained British citizenship in 1928. In 1929, he relinquished his Finnish citizenship. In London, he studied architecture at the
Northern Polytechnic from 1927 to 1931 and won a scholarship to the
Architectural Association Schools, where he received his diploma in 1932. Yorke, Rosenberg & Mardall offices were established in London and later in
Hong Kong,
Singapore,
Nigeria,
Cairo, Egypt, and
Sydney, Australia. In the late 1950s, Mardall assisted Finnish-American architect
Eero Saarinen during the construction phase of the United States Embassy in London. Later, he actively promoted cultural connections between Finland and Britain. The firm is today part of
RMJM. From the mid-1970s onwards, he designed buildings in
Ireland and the
Caribbean in partnership with his wife
June Park (1920–2018). Cyril Mardall died in London on 1 June 1994. ==Notable works==