[4] Cattigan played inside centre for her University and Stirling County, before moving into the back-row, usually in position 6 or 8, for both club rugby and for Scotland.

[6] She made her international debut in the 2018 Women's Six Nations Championship in a match between Wales and Scotland, coming off the bench and into blindside flanker.

[14] Cattigan received the War Memorial Prize from her high school in recognition of her charity work for Yorkhill Children's Foundation.

[1][14][17] The Daily Telegraph reported that her death was unrelated to COVID-19, contrary to rumours spread on social media by anti-vaccination conspiracy theorists.

[18] Her father has said "It had got to the point where she could no longer live with the pain in her head and Siobhan succumbed to an irrational thought and impulsive action.