https://blogs.lse.ac.uk/brexit/2021/02/26/future-british-european-security-relations-are-a-matter-of-trust/
https://www.bruegel.org/2022/02/preparing-for-the-first-winter-without-russian-gas/
http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf