Foster's friends and colleagues announced her death on 15 July 2021. Foster had been discharged from hospital on 9 July and was found in her home, having died suddenly of complications related to her long-term health problems. Tributes were paid by fellow political commentators and journalists on social media. A number of politicians, including Jeremy Corbyn, Mary Lou McDonald, Angela Rayner, and John McDonnell, expressed their condolences.
Foster's first book, Lean Out, was published in January 2016 by Repeater Books. According to her biography in the London Review of Books, at the time of her death she was working on another book, a cultural history of the dole.
Awards and influence
Foster was awarded the International Building Press Prize for Young Journalist of the Year in 2014, was named Non-traditional Journalist of the Year at the inaugural Words by Women Awards, longlisted for the Orwell Prize for Exposing Britain's Social Evils in 2017, and shortlisted for the Bread and Roses Award 2017.
In September 2017, Foster was listed at Number 82 in "The 100 Most Influential People on the Left" by political commentator Iain Dale.
^General Register Office; United Kingdom; Reference: Volume 28, Page 913
This is available on genealogy sites. All of Foster’s older siblings are born in Newport Wales. Foster’s record on ancestry has a transcription error for an area in Shropshire but this has been flagged for correction. Foster’s mother confirms her birthplace.