Katherine Flegg was born in 1934 in Dublin, and soon after her family moved to London. She attended St Paul’s Girls School, where Herbert Howells was head of music, and subsequently studied the cello at the Royal Academy of Music and the Akademie für Music und darstellende Kunst in Vienna. She returned to London in 1958; and in 1964, she married Nikolaus Dimitrakopoulos from Thessaloniki, and returned to Greece with him. There she joined the State Orchestra of Northern Greece (now the Thessaloniki State Orchestra), and also worked with a number of other, smaller ensembles.