Sources: Which?, Vodafone-Three merger: what you need to know (2025); Clifford Chance, CMA clears Vodafone/Three (December 2024); Dechert, changes to UK competition law from 1 January 2025; Steptoe, CMA strategic market status designations (October 2025). Diagrams drawn with Rough.js and perfect-freehand, both MIT licensed. Your answers are saved only on this device.