One of our Directors, James Harvey, has shared his insights on the Competition Appeals Tribunal’s (CAT) certification of the claim brought by Mr Merricks against Mastercard, the first-ever antitrust class action in the UK. His article explores the CAT’s decision to not allow the claim to include compound interest, which reduces the potential claim from £16 billion to £13.8 billion – a reduction of around £48 for each of the 46 million people in the class.