This week's edition of Competition weekly highlights includes, from a UK perspective: (1) the CMA publishing finalised versions of six updated mergers guidance documents to reflect jurisdictional and procedural changes introduced by DMCCA 2024, (2) the CMA’s decision that the Synopsys/Ansys merger meets the test for reference to phase 2, (3) a CAT judgment largely dismissing Keltbray’s appeal against a construction cartel fine, as well as upholding the CMA’s application to revoke a settlement discount resulting in a higher fine, (4) the CMA publishes an updated version of its Guidance on investigation procedures under the CA 1998 cases following changes brought by the DMCCA, (5) CMA announces it intends to launch SMS investigations in relation to 3 distinct digital activities within six months of regime, (6) the CMA publishes final guidance on the digital markets competition regime, as well a separate guidance on the merger reporting requirements for SMS firms, (7) CMA publishes updated version of the its rules of procedure setting out the board’s powers and functions, (8) the CAT’s judgment dismissing a claim regarding excessive pricing brought against BT in the first opt-out competition collective action to go to trial, and (9) Court of Appeal dismisses appeal against CAT’s judgment finding it was not bound by a post-Brexit judgment on limitation relating to the Merchant Interchange Fee Umbrella Proceedings against Mastercard and Visa. This week's highlights also includes, from an EU perspective: (1) the Commission’s decision to refer Liberty Media/Dorna Sports merger to a phase II investigation, (2) the Commission’s announcement that it is seeking feedback on the measures Apple should take to ensure interoperability under the Digital Markets Act.