
https://www.theguardian.com/politics/2025/oct/10/the-1m-man-why-did-boris-johnson-take-his-donor-to-ukraine

https://publiclawforeveryone.com/2017/06/10/does-the-salisbury-convention-apply-during-a-hung-parliament/

https://www.ifs.org.uk/uploads/publications/bns/BN211.pdf