Programme available at the following link:
https://www.channel4.com/programmes/know-your-st-inside-our-guts/on-demand/73111-001

(Feature 37:15 – 41:25)

Article available at the following link:

https://metro.co.uk/2023/01/17/know-your-st-channel-4-documentary-explores-perfect-poos-18114399/