Muriel Byck (4 June 1918 – 23 May 1944) was an agent of the United Kingdom's clandestine Special Operations Executive (SOE) organization in France during World War II.

She was described by her instructors on her SOE file as: a quiet, bright, attractive girl, keen, enthusiastic and intelligent.

She is, however, self-possessed, independent and persistent, and warm in her feelings for others... a girl of considerable promise who will require much training to help her to overcome her lack of experience, her complete ignorance of what the work really involves and her general guilelessness.

[1] Byck lodged at a safe house in the town of Salbris owned by French Resistant Antoine Vincent.

[citation needed] Byck worked long hours as a wireless operator, so fatigue was expected.

This posed a problem as the Germans kept a check on hospital admissions and scrutinised the papers of all people entering.

[citation needed] A plaque in her memory, with an unusual Hebrew inscription from the Book of Joshua, was unveiled on the wall of the house where she lived in Torquay for some years, in 2014, by The Torbay Civic Society and AJEX, represented by historian Martin Sugarman.

By viewing the web site of Cathie Hewitt, 'Remembering Jews of WW2' readers may see the moving poem about Muriel (https://www.rememberingthejewsofww2.com/?s=muriel+byck)