www.skadden.com/insights/publications/2017/05/english-court-questions-the-application
www.allenovery.com/publications/en-gb/Pages/SFO-v-ENRC-privilege-ruling-restricts-privilege-in-internal-corruption-investigation.aspx
See also:
globalinvestigationsreview.com/guide/the-practitioners-guide-global-investigations/2021/article/privilege-the-uk-perspective
When can lawyers keep documents confidential on privilege grounds? (stewartslaw.com)