In 2013 she was invited by Caroline Lucas MP to sit on "The Future of Our Railways" panel at the annual conference of the Green Party of England and Wales in Brighton. On 26 April 2015, less than six years after its launch, the Bring Back British Rail campaign reached a milestone of 100,000 supporters on its Facebook page. Later that year, after Jeremy Corbyn was elected leader of the Labour Party, rail re-nationalisation became the Official Opposition policy. In 2013, Harrison led the "Say NO to Tesco in Scotland" campaign, which began as a protest against the proliferation  of small supermarkets in the West end of Glasgow. The campaign group presented a petition to "stop supermarket expansion on local high streets" to the Public Petitions Committee at the Scottish Parliament in January 2014. In September 2014, after hearing the petition on three further occasions, the Committee referred it to the Local Government & Regeneration Committee to be considered in the context the Community Empowerment (Scotland) Bill. In January 2015, due to falling sales and profit warnings in 2014, Tesco announced it was axing plans for eight new stores in Scotland and closing 43 of its smaller stores across the UK. As an exploration of bureaucratic processes, over the last few years Harrison has been involved in the setting-up and running of a number of experimental and fully functional organisations and institutions, including the "National Museum of Roller Derby" (NMRD), which she founded at Glasgow Women's Library in 2012. Harrison first became involved in the sport of Women's Flat Track Roller Derby at the start of 2012, when she began training with Glasgow Roller Derby under the skater name CH£AP SKATE 79. This coincided with her time as artist in residence at Glasgow Women's Library as part of the "21 Revolutions" project, celebrating the twentieth anniversary of the library. On 14 June 2012 the NMRD was launched, by establishing the library the official home of the UK's first permanent archive of materials and ephemeral relating to this all-female, full-contact sport. In 2011, Harrison was shortlisted for the Converse/Dazed Emerging Artists Award with the Whitechapel Gallery, London alongside Gabriele Beveridge, Bruce Ingram, Samuel Levack & Jennifer Lewandowski and Richard Parry. Later that year she was featured in "The Hot 100" – The List (magazine)'s "definitive list of Scottish creative talent" and on The Independent on Sunday's "Pink List" as "one to watch".