Accountability – FM (foundation model) developers and deployers are accountable for outputs provided to consumers.
Access – ongoing ready access to key inputs, without unnecessary restrictions.
Diversity – sustained diversity of business models, including both open and closed.
Choice – sufficient choice for businesses so they can decide how to use FMs.
Flexibility – having the flexibility to switch and/or use multiple FMs according to need.
Fair dealing – no anti-competitive conduct including anti-competitive self-preferencing, tying or bundling.
Transparency – consumers and businesses are given information about the risks and limitations of FM-generated content so they can make informed choices.
Here is the actual release by the gov: https://www.gov.uk/government/news/proposed-principles-to-guide-competitive-ai-markets-and-protect-consumers