Career
She was one of the first three British Broadcasting Corporation Television Service presenters, along with Jasmine Bligh and Leslie Mitchell. She began announcing when the Television Service started in 1936 and made her debut on Monday 31 August that year at Alexandra Palace in London. This was a few months before the official launch of British Broadcasting Corporation Television on 2 November, 1936.
She returned in 1946 after its nearly seven-year hiatus due to the Second World War.
Cowell was the voice of "the Woman" on the soundtrack of Paul Rotha"s documentary Land of Promise (1946).
