From BBC National Orchestra of Wales:
It’s with tremendous sadness that we share that our much loved colleague and friend Eva Stewart has passed away. Eva joined the Orchestra in 2002 as our Principal Piccolo and constantly amazed us with her wonderful musicianship and dedication. Her skill and sincere musicality were real gifts to be treasured and she will be greatly missed. Our thoughts go out to her partner Bill, and her family and friends.
— BBC Newsnight (@BBCNewsnight) August 23, 2017
UPDATE: We understand that Eva died while on holiday in Egypt.
From her bio:
Eva Stewart was born in Aberdeen, Scotland, and grew up in the Midlands…. Graduating from the Guildhall in 1993, she won the Lord Mayor’s Prize and joined the Northern Sinfonia, where for nearly ten years she enjoyed a great variety of music-making, with a particular focus on chamber music. During this time she discovered her love for community music-making, teaching and workshops. This led to the completion of an MA in music education in 2001. The following year she joined the BBC National Orchestra of Wales as principal piccolo. An enthusiastic teacher, she is a professor at the Royal Welsh College of Music and Drama. In addition to orchestral playing, she has collaborated with singers, dancers and storytellers in mixed media and improvised performances.